Summary
Plan status as of 2026-09-30: Approved, expires 2026-12-26. Plan: Orange County (FEMA plan 107719), approved 2021-12-27.
Since the plan was approved on 2021-12-27: 3 new hazard declarations (3 incidents): FM-5439-CA (Coastal Fire), EM-3591-CA (Severe Winter Storms, Flooding, and Mudslides), EM-3592-CA (Severe Winter Storms, Flooding, Landslides, and Mudslides); also 1 non-natural declaration (not counted).
NOAA Storm Events records since that date: 125 records (data through 2026-06-30).
Highest expected annual loss (FEMA National Risk Index, modeled total; see B1-a): Earthquake ($1,015,337,591 a year), Inland Flooding ($819,930,991) and Wildfire ($57,585,624).
Repetitive-loss flood properties now: FMA RL 10, SRL 11 (44 CFR 77.2); any definition: 103.
The tables that follow are organized by the items of FEMA's Local Mitigation Plan Review Tool, Element B (B1-a to B2-c); each heading says which item its tables support.
Plan clock
- Status:
- Approved, expires 2026-12-26
- Plan:
- Orange County (FEMA plan 107719)
- Approved:
- 2021-12-27
- Days to expiry:
- 87
- Update underway:
- none recorded in FEMA's plan tracker
What changed since your last plan (approved 2021-12-27)
- New federal declarations:
- 3 new hazard declarations (3 incidents): FM-5439-CA (Coastal Fire), EM-3591-CA (Severe Winter Storms, Flooding, and Mudslides), EM-3592-CA (Severe Winter Storms, Flooding, Landslides, and Mudslides); also 1 non-natural declaration (not counted)
- Storm Events records since approval:
- 125 records (data through 2026-06-30)
- Repetitive loss now:
- FMA RL 10, SRL 11 (44 CFR 77.2); any definition: 103
- Repeat-flood change:
- this release sets the baseline count.
Sources: 1, 2, 4, 6 (numbered list at the end)
Plan status for every jurisdiction listed in this county: 56 rows, in the section "Plan clock: Plan status for every jurisdiction listed in this county" on the following pages.
State plan status and tribal plans in this state: see the state page.
Plan clock
Plan status for every jurisdiction listed in this county
Source: 1
| Jurisdiction | Type | Status | Plan | Approved | Expires | Days to expirynegative = days since expiry | Update underway | Notes |
|---|---|---|---|---|---|---|---|---|
| Orange County | County | Approved, expires 2026-12-26 | Orange County (FEMA plan 107719) | 2021-12-27 | 2026-12-26 | 87 | ||
| Aliso Viejo city | City | Approved, expires 2029-07-17 | Aliso Viejo, City of (FEMA plan 109776) | 2024-07-18 | 2029-07-17 | 1,021 | ||
| Anaheim city | City | Approved, expires 2027-09-05 | Anaheim, City of (FEMA plan 108316) | 2022-09-06 | 2027-09-05 | 340 | ||
| Brea city | City | Approved, expires 2029-10-29 | Brea, City of (FEMA plan 110113) | 2024-10-30 | 2029-10-29 | 1,125 | ||
| Buena Park city | City | Approved, expires 2027-12-19 | Buena Park, City of (FEMA plan 108548) | 2022-12-20 | 2027-12-19 | 445 | ||
| Costa Mesa city | City | Approved, expires 2028-04-17 | Costa Mesa, City of (FEMA plan 108776) | 2023-04-18 | 2028-04-17 | 565 | ||
| Dana Point city | City | Approved, expires 2030-02-04 | Dana Point, City of (FEMA plan 110327) | 2025-02-05 | 2030-02-04 | 1,223 | ||
| Fountain Valley city | City | Approved, expires 2030-11-09 | Fountain Valley, City of (FEMA plan 111077) | 2025-11-10 | 2030-11-09 | 1,501 | ||
| Fullerton city | City | Approved, expires 2031-07-08 | Fullerton, City of (FEMA plan 111785) | 2026-07-09 | 2031-07-08 | 1,742 | ||
| Garden Grove city | City | Expired on 2025-09-17 | Garden Grove, City of (FEMA plan 106425) | 2020-09-18 | 2025-09-17 | -378 | ||
| Huntington Beach city | City | Approved, expires 2028-01-13 | Huntington Beach, City of (FEMA plan 108619) | 2023-01-14 | 2028-01-13 | 470 | ||
| Irvine city | City | No approved plan on record. Approvable pending adoption, not yet eligible | none | none | none | FEMA tracker shows a plan approvable pending adoption | Not yet eligible: adopt the approved plan. | |
| La Habra city | City | Expired on 2025-04-13 | La Habra, City of (FEMA plan 106180) | 2020-04-14 | 2025-04-13 | -535 | ||
| La Palma city | City | Expired on 2025-04-16 | La Palma, City of (FEMA plan 106229) | 2020-04-17 | 2025-04-16 | -532 | ||
| Laguna Beach city | City | Approved, expires 2028-12-21 | Laguna Beach, City of (FEMA plan 109423) | 2023-12-22 | 2028-12-21 | 813 | ||
| Laguna Hills city | City | Approved, expires 2030-04-14 | Laguna Hills, City of (FEMA plan 110334) | 2025-04-15 | 2030-04-14 | 1,292 | ||
| Laguna Niguel city | City | Approved, expires 2029-01-22 | Laguna Niguel, City of (FEMA plan 108847) | 2024-01-22 | 2029-01-22 | 845 | ||
| Laguna Woods city | City | Expired on 2018-05-27 | Laguna Woods, City of (FEMA plan 81270) | 2013-05-27 | 2018-05-27 | -3,048 | ||
| Lake Forest city | City | Approved, expires 2029-09-05 | Lake Forest, City of (FEMA plan 109899) | 2024-09-06 | 2029-09-05 | 1,071 | ||
| Mission Viejo city | City | Approved, expires 2030-04-14 | Mission Viejo, City of (FEMA plan 109926) | 2025-04-15 | 2030-04-14 | 1,292 | ||
| Newport Beach city | City | Expired on 2021-09-26 | Newport Beach, City of (FEMA plan 102049) | 2016-09-26 | 2021-09-26 | -1,830 | ||
| Orange city | City | Approved, expires 2031-05-06 | Orange, City of (FEMA plan 111787) | 2026-05-07 | 2031-05-06 | 1,679 | ||
| Placentia city | City | Approved, expires 2029-07-17 | Placentia, City of (FEMA plan 109772) | 2024-07-18 | 2029-07-17 | 1,021 | ||
| Rancho Santa Margarita city | City | Approved, expires 2030-07-15 | Rancho Santa Margarita, City of (FEMA plan 110553) | 2025-07-16 | 2030-07-15 | 1,384 | ||
| San Clemente city | City | Approved, expires 2030-04-14 | San Clemente, City of (FEMA plan 110458) | 2025-04-15 | 2030-04-14 | 1,292 | ||
| San Juan Capistrano city | City | Expired on 2025-04-22 | San Juan Capistrano, City of (FEMA plan 106331) | 2020-04-23 | 2025-04-22 | -526 | ||
| Santa Ana city | City | Approved, expires 2028-02-06 | Santa Ana, City of (FEMA plan 108208) | 2023-02-07 | 2028-02-06 | 494 | ||
| Seal Beach city | City | Approved, expires 2030-11-16 | Seal Beach, City of (FEMA plan 111135) | 2025-11-17 | 2030-11-16 | 1,508 | ||
| Stanton city | City | Approved, expires 2028-04-17 | Stanton, City of (FEMA plan 108608) | 2023-04-18 | 2028-04-17 | 565 | ||
| Tustin city | City | Expired on 2024-11-06 | Tustin, City of (FEMA plan 105774) | 2019-11-07 | 2024-11-06 | -693 | ||
| Villa Park city | City | Expired on 2026-07-13 | Villa Park, City of (FEMA plan 107223) | 2021-07-14 | 2026-07-13 | -79 | ||
| Westminster city | City | Expired on 2021-05-13 | Westminster, City of (FEMA plan 102262) | 2016-05-13 | 2021-05-13 | -1,966 | ||
| Yorba Linda city | City | Approved, expires 2028-10-22 | Yorba Linda, City of (FEMA plan 109252) | 2023-10-23 | 2028-10-22 | 753 | ||
| Name not given in FEMA data (ID R09_202794) | School/School District | Expired on 2010-07-26 | Saddleback Valley Unified School District (FEMA plan 81413) | 2005-07-26 | 2010-07-26 | -5,910 | ||
| Coast Community College District | College/University | Approved, expires 2027-05-19 | Coast Community College District (FEMA plan 107939) | 2022-05-20 | 2027-05-19 | 231 | ||
| Costa Mesa Sanitary District | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | this jurisdiction approved 2025-05-14 | |
| East Orange County Water District | Water/Sewer Authority | Approved, expires 2031-02-10 | East Orange County Water District (FEMA plan 111579) | 2026-02-11 | 2031-02-10 | 1,594 | ||
| El Toro Water District | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | this jurisdiction approved 2025-05-14 | |
| Irvine Ranch Water District | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | this jurisdiction approved 2025-05-14 | |
| Laguna Beach County Water District | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | this jurisdiction approved 2025-06-02 | |
| Mesa Consolidated Water District | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | ||
| Midway City Sanitary District | Water/Sewer Authority | Approved, expires 2030-10-21 | Midway City Sanitary District (FEMA plan 111078) | 2025-10-22 | 2030-10-21 | 1,482 | ||
| Moulton Niguel Water District | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | this jurisdiction approved 2025-05-27 | |
| Municipal Water District of Orange County | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | ||
| Orange County Fire Authority | Fire/EMS District | Approved, expires 2026-12-26 | Orange County (FEMA plan 107719) | 2021-12-27 | 2026-12-26 | 87 | ||
| Orange County Sanitation District | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | this jurisdiction approved 2025-07-28 | |
| Orange County Transportation Authority | Transit/Airport | Approved, expires 2027-10-26 | Orange County Transportation Authority (FEMA plan 108228) | 2022-10-27 | 2027-10-26 | 391 | ||
| Orange County Water District | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | this jurisdiction approved 2025-09-15 | |
| Rancho Santiago Community College District | College/University | Expired on 2022-11-14 | Rancho Santiago Community College District (FEMA plan 102698) | 2017-11-15 | 2022-11-14 | -1,416 | ||
| Santa Margarita Water District | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | this jurisdiction approved 2025-09-05 | |
| Serrano Water District | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | this jurisdiction approved 2025-06-02 | |
| South Coast Water District | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | this jurisdiction approved 2025-09-15 | |
| South Orange County Wastewater Authority | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | this jurisdiction approved 2025-05-14 | |
| Southern Orange County Community College District | College/University | Approved, expires 2027-09-13 | South Orange County Community College District (FEMA plan 108217) | 2022-09-14 | 2027-09-13 | 348 | ||
| Trabuco Canyon Water District | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | this jurisdiction approved 2025-05-27 | |
| Yorba Linda Water District | Water/Sewer Authority | Approved, expires 2030-04-14 | Orange County, Municipal Water District of (FEMA plan 110682) | 2025-04-15 | 2030-04-14 | 1,292 | this jurisdiction approved 2025-06-02 |
Supports FEMA checklist item B1-a: hazard identification
Hazards NRI does not cover (local data needed)
- dam failure (incl. upstream dams)
- levee failure
- flash flood as its own subtype
- ice jams
- debris flows
- erosion (riverine and coastal)
- land subsidence and sinkholes
- expansive soils
The 18 National Risk Index hazards, ranked by expected annual loss (EAL)
Sources: 5, 6
| Rank by EAL | Hazard | NRI risk rating | EAL rating | EAL buildingsmodeled dollars per year | EAL agriculturemodeled dollars per year | Cost of expected deaths and injuriesFEMA's dollar value per year, not property damage | EAL total (see note)modeled dollars per year | Storm Events records, 1996 to 2026-06-30count | Storm Events coverage note |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Earthquake | Very High | Very High | $706,143,269 | n/a | $309,194,322 | $1,015,337,591 | Storm Events does not record earthquakes. | |
| 2 | Inland Flooding | Very High | Very High | $818,458,922 | $42,587 | $1,429,482 | $819,930,991 | 138 | |
| 3 | Wildfire | Relatively High | Relatively High | $54,812,095 | $3,585 | $2,769,945 | $57,585,624 | 40 | |
| 4 | Heat Wave | Relatively High | Relatively High | $5,894 | $6,845 | $11,014,018 | $11,026,757 | 51 | |
| 5 | Coastal Flooding | Relatively High | Relatively High | $8,410,595 | n/a | $2,542 | $8,413,133 | 14 | |
| 6 | Tornado | Relatively Moderate | Relatively Moderate | $3,429,754 | $610 | $1,917,996 | $5,348,360 | 7 | |
| 7 | Landslide | Relatively High | Relatively High | $942,120 | n/a | $3,237,130 | $4,179,250 | 13 | |
| 8 | Tsunami | Relatively Low | Relatively Low | $2,529,600 | n/a | $0 | $2,529,600 | 3 | |
| 9 | Hail | Relatively Moderate | Relatively Moderate | $900,264 | $441 | $36,678 | $937,384 | 11 | |
| 10 | Strong Wind | Relatively Moderate | Relatively Moderate | $339,316 | $1,650 | $311,609 | $652,575 | 255 | Includes 195 High Wind and 28 Strong Wind records (NOAA non-thunderstorm wind types, outside NRI's Strong Wind definition). |
| 11 | Lightning | Relatively Moderate | Relatively Moderate | $5,801 | n/a | $482,869 | $488,671 | 4 | |
| 12 | Drought | Relatively Low | Relatively Low | n/a | $36,627 | n/a | $36,627 | 26 | |
| 13 | Winter Weather | Very Low | Very Low | $2 | under $1 | $131 | $133 | 10 | |
| 14 | Avalanche | Very Low | Very Low | $2 | n/a | $14 | $16 | 0 | No recorded events in Storm Events since 1996 (data through 2026-06-30). |
| 15 | Cold Wave | No Rating | No Expected Annual Losses | $0 | $0 | $0 | $0 | 2 | Includes 2 Frost/Freeze records (outside NRI's Cold Wave definition; counted in this table and in B1-d, not in the B1-e descriptor). |
| 16 | Hurricane | No Rating | No Expected Annual Losses | $0 | $0 | $0 | $0 | 1 |
Total = buildings + agriculture + population equivalence; FEMA values each expected death (or 10 injuries) at $13.7 million (2024 dollars).
NRI risk rating combines expected annual loss with social vulnerability and community resilience; EAL rating rates expected annual loss alone. Both compare this county with all U.S. counties.
Not applicable to this county per NRI, with no federal declaration and no Storm Events record since 1996: ice storm and volcanic activity. That is the evidence for leaving them out of the plan.
The state hazard mitigation plan also lists hazards for this county; FEMA asks the plan to explain any hazard it leaves out.
Supports FEMA checklist item B1-b: hazard location
Affects the whole county (national data give no location within it): Cold Wave, Drought, Hail, Heat Wave, Lightning, Strong Wind and Winter Weather.
Coastal Flooding and Inland Flooding: The FEMA Flood Insurance Rate Map (FIRM) is the required location source for flooding. See the FEMA Flood Map Service Center (https://msc.fema.gov) for this county.
Hazards that vary within the county: highest-rated census tracts
Source: 5
| Hazard | Highest-rated census tractsNRI risk rating, score 0 to 100 |
|---|---|
| Avalanche | tract 320.11 (Very Low, 5.5); tract 219.24 (Very Low, 5.0); tract 320.41 (Very Low, 4.7) |
| Earthquake | tract 116.02 (Very High, 100.0); tract 115.04 (Very High, 99.9); tract 1101.13 (Very High, 99.9) |
| Hurricane | no tract has a National Risk Index rating for this hazard |
| Landslide | tract 320.11 (Very High, 99.9); tract 320.66 (Relatively High, 99.9); tract 626.56 (Relatively High, 99.9) |
| Tornado | tract 626.14 (Relatively Low, 48.9); tract 755.16 (Relatively Low, 43.3); tract 116.02 (Relatively Low, 42.4) |
| Tsunami | tract 995.14 (Relatively Moderate, 88.7); tract 995.12 (Relatively Moderate, 85.1); tract 995.13 (Relatively Moderate, 81.9) |
| Wildfire | tract 320.66 (Very High, 100.0); tract 320.11 (Very High, 99.8); tract 320.42 (Very High, 99.6) |
Up to 3 census tracts per hazard, highest National Risk Index rating first, then highest score; a tract number is the Census tract number (for example 320.11 is Census Tract 320.11). FEMA's Resilience Analysis and Planning Tool maps the National Risk Index for every tract: https://www.fema.gov/emergency-managers/practitioners/resilience-analysis-and-planning-tool
Supports FEMA checklist item B1-c: hazard extent
Extent: scale, observed range and worst recorded event per hazard
Sources: 6, 7
| Hazard | Scale | Recordscount and years | Observed range | Worst recorded event | Most damaging (when different) | How it applies to jurisdictions | Note |
|---|---|---|---|---|---|---|---|
| Avalanche | none (count and damage only) | 0 | Physical measure: in event narratives only (local data needed). | ||||
| Coastal Flood, Storm Surge/Tide | none in data (flood depth: FIRM) | 14 records, 1998 to 2026 (12 zone-level) | Storm Surge/Tide, 2001-01-09, $240,000 property; crops not reported (2001 dollars) | Event records naming jurisdictions in the plan: Newport Beach city (1 record), Seal Beach city (1 record). Zone-level records (12) apply countywide. | Flood depth: see the FEMA Flood Insurance Rate Map. | ||
| Cold/Wind Chill, Extreme Cold/Wind Chill | wind chill | 0 | Wind chill: in event narratives only (local data needed). | ||||
| Frost/Freeze (outside NRI's Cold Wave definition) | crop damage | 2 records, 2004 to 2022 (2 zone-level) | No crop damage reported in 2 records. | Countywide (zone-level records). | Temperature: in event narratives only (local data needed). | ||
| Drought | U.S. Drought Monitor scale (D0 to D4) | 26 records, 2007 to 2009 (26 zone-level) | 167 days to 365 days (median 245 days); 3 with a recorded value | 365 days (12 months), 2009-01-01 to 2009-12-31, a run of 12 consecutive Storm Events drought records, zone-level | Countywide (zone-level records). | Storm Events enters a drought at D2 or worse east of the Rockies and D3 or worse from the Rockies west (NWS Instruction 10-1605); NRI drought counts D3 and D4 only. | |
| Earthquake | Modified Mercalli (local data) | 0 | Storm Events does not record earthquakes; the USGS earthquake catalog is the source. | ||||
| Hail | hail size (inches) | 13 records, 1979 to 2019 | 0.25 in to 2 in (median 0.75 in); 13 with a recorded value | 2 in hail, 1979-01-31 | Hail, 2000-03-06, $75,000 property; crops not reported (2000 dollars) | Event records naming jurisdictions in the plan: Yorba Linda city (2 records), Anaheim city (1 record), Costa Mesa city (1 record), Garden Grove city (1 record), Huntington Beach city (1 record), Laguna Beach city (1 record), Laguna Hills city (1 record), San Clemente city (1 record), Tustin city (1 record). | |
| Excessive Heat, Heat | heat index (in event narratives) | 51 records, 1997 to 2026 (51 zone-level) | 1 day to 12 days (median 3 days); 35 with a recorded value | 12 consecutive days, 2023-07-11 to 2023-07-22, zone-level | Countywide (zone-level records). | Heat index: in event narratives only (local data needed). Heat records from November to March (unseasonable warmth, not a heat wave) are counted but not used for the longest run. | |
| Hurricane, Tropical Storm, Tropical Depression | Saffir-Simpson | 1 record, 2023 (1 zone-level) | Strongest recorded: Tropical Storm record, 2023-08-20 to 2023-08-21, $0 property; $0 crops (2023 dollars); NWS zone CAZ057 | Countywide (zone-level records). | Storm Events files every zone of a storm's episode under the storm's type; flooding from the storm is filed as Flood or Flash Flood records. | ||
| Flash Flood, Flood, Lakeshore Flood | damage and flood days (flood depth: FIRM) | 138 records, 1997 to 2026 | Flood, 2010-12-19, $36,000,000 property; $0 crops (2010 dollars) | Event records naming jurisdictions in the plan: San Clemente city (10 records), Huntington Beach city (9 records), Seal Beach city (9 records), Irvine city (7 records), Yorba Linda city (7 records), Santa Ana city (6 records), Garden Grove city (4 records), Laguna Beach city (4 records), Placentia city (4 records), Tustin city (4 records); and 11 more jurisdictions (see the Excel file). | Flood depth: see the FEMA Flood Insurance Rate Map. Storm Events damage is often $0 or blank for floods, major ones included; FEMA Public Assistance by declaration (B1-d) shows which floods cost the most. | ||
| Debris Flow | none (count and damage only) | 13 records, 2003 to 2023 (3 zone-level) | Debris Flow, 2005-02-20, $300,000 property; crops not reported (2005 dollars), 1 direct death (reported for the zone); NWS zone CAZ057 | Event records naming jurisdictions in the plan: Mission Viejo city (1 record), San Clemente city (1 record). Zone-level records (3) apply countywide. | Physical measure: in event narratives only (local data needed). | ||
| Lightning | annualized frequency (the measure FEMA's Local Mitigation Planning Handbook names) | 4 records, 1998 to 2016 | Lightning, 2000-03-03, $50,000 property; crops not reported (2000 dollars) | Event records naming jurisdictions in the plan: Irvine city (1 record), Newport Beach city (1 record), San Clemente city (1 record). | Storm Events lists lightning with damage or casualties; physical measure in event narratives only (local data needed). | ||
| High Wind and Strong Wind (outside NRI's Strong Wind definition) | wind speed (kt and mph) | 223 records, 1996 to 2026 (223 zone-level) | 26 kt (30 mph) to 104 kt (120 mph) (median 60 kt (69 mph)); 223 with a recorded value | 104 kt (120 mph), measurement type not recorded, High Wind, 1999-12-03; NWS zone CAZ057 | Strong Wind, 2017-02-17, $200,000 property; $0 crops, reported for the zone (2017 dollars) | Countywide (zone-level records). | |
| Thunderstorm Wind | wind speed (kt and mph) | 38 records, 1978 to 2026 | 26 kt (30 mph) to 81 kt (93 mph) (median 52 kt (60 mph)); 35 with a recorded value | 81 kt (93 mph) measured gust, Thunderstorm Wind, 2010-01-19 | Thunderstorm Wind, 1998-12-06, $450,000 property; crops not reported (1998 dollars) | Event records naming jurisdictions in the plan: Laguna Beach city (3 records), Newport Beach city (3 records), Costa Mesa city (2 records), Huntington Beach city (2 records), Orange city (2 records), San Clemente city (2 records), Brea city (1 record), Buena Park city (1 record), Fullerton city (1 record), Garden Grove city (1 record); and 6 more jurisdictions (see the Excel file). | |
| Tornado | Enhanced Fujita (Fujita before Feb 2007) | 31 records, 1958 to 2010 | F/EF0 to F/EF3 (median F/EF0); 28 with a recorded value | F3 tornado, 1978-02-09, 2 mi path length (whole path, pre-1996), 67 yd wide, $2,500,000 property; crops not recorded (1978 dollars), 6 direct injuries | Tornado, 1993-01-17, $5,000,000 property; crops not recorded (1993 dollars) | Event records naming jurisdictions in the plan: Huntington Beach city (3 records), Newport Beach city (2 records), Brea city (1 record), Irvine city (1 record), Lake Forest city (1 record), Orange city (1 record), Santa Ana city (1 record), Seal Beach city (1 record), Tustin city (1 record). | Before 1996 a tornado is listed once, under the county where it began, with its whole path's rating and length; from 1996 on, each county lists its own segment. Length is not used to rank tornadoes (see Methods). |
| Tsunami | none (count and damage only) | 3 records, 2015 to 2025 (3 zone-level) | No damage reported in 3 records. | Countywide (zone-level records). | Physical measure: in event narratives only (local data needed). | ||
| Wildfire | acres burned (local data) | 40 records, 1996 to 2024 (20 zone-level) | Wildfire, 2022-05-11, $60,000,000 property; $0 crops (2022 dollars); NWS zone CAZ552 | Event records naming jurisdictions in the plan: Mission Viejo city (4 records), Lake Forest city (2 records), San Clemente city (2 records), Yorba Linda city (2 records), Anaheim city (1 record), Costa Mesa city (1 record), Garden Grove city (1 record), Laguna Beach city (1 record). Zone-level records (20) apply countywide. | Acres burned: in event narratives only (local data needed). | ||
| Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleet | none in data (snowfall: local data) | 10 records, 1997 to 2023 (10 zone-level) | Heavy Snow, 2019-02-21, $30,000 property; $0 crops (2019 dollars); NWS zone CAZ057 | Countywide (zone-level records). | Snow depth: in event narratives only (local data needed). |
Where a hazard names more than 10 jurisdictions, the table lists the 10 with the most records; every one is in the Excel file, sheet "B1-c Extent".
Storm Events records are more complete after 1996; before 1996 only Tornado (from 1950), Hail and Thunderstorm Wind (from 1955) exist. Zone-level records whose zone no NWS zone-county file places in this county (mostly before 2020) are not counted here (the Methods page explains the zone matching).
Dollars are nominal (as reported), labeled with the year; not adjusted for inflation.
Supports FEMA checklist item B1-d: previous occurrences
Federal declarations for this county: 42 declarations covering 34 separate hazard incidents counted in this packet (declarations for the same incident count once; non-natural and evacuation-only declarations are not counted).
Federal disaster declarations for this county
Sources: 1, 2, 3
| Declared | Incident began | FEMA number | Type | Title | Mapped hazard | County Public Assistancefederal share obligated, nominal dollars | Flags | Notes |
|---|---|---|---|---|---|---|---|---|
| 2026-05-25 | 2026-05-21 | EM-3646-CA | Emergency | Chemical Release | Non-natural, not counted | no Public Assistance recorded | new since last plan; within last 5 years | |
| 2023-03-10 | 2023-03-09 | EM-3592-CA | Emergency | Severe Winter Storms, Flooding, Landslides, and Mudslides | Inland Flooding (primary); also designated: Landslide, Winter Weather | no Public Assistance recorded | new since last plan; within last 5 years | |
| 2023-01-09 | 2023-01-08 | EM-3591-CA | Emergency | Severe Winter Storms, Flooding, and Mudslides | Inland Flooding (primary); also designated: Landslide, Winter Weather | no Public Assistance recorded | new since last plan; within last 5 years | |
| 2022-05-12 | 2022-05-11 | FM-5439-CA | Fire management | Coastal Fire | Wildfire | no Public Assistance recorded | new since last plan; within last 5 years | |
| 2020-12-03 | 2020-12-03 | FM-5383-CA | Fire management | Bond Fire | Wildfire | no Public Assistance recorded | ||
| 2020-10-26 | 2020-10-26 | FM-5381-CA | Fire management | Blue Ridge Fire | Wildfire | no Public Assistance recorded | ||
| 2020-10-26 | 2020-10-26 | FM-5380-CA | Fire management | Silverado Fire | Wildfire | no Public Assistance recorded | ||
| 2020-03-22 | 2020-01-20 | DR-4482-CA | Major disaster | COVID-19 Pandemic | Non-natural, not counted | $213,521,546.04 | ||
| 2020-03-13 | 2020-01-20 | EM-3428-CA | Emergency | COVID-19 | Non-natural, not counted | no Public Assistance recorded | same incident as DR-4482 | |
| 2017-10-10 | 2017-10-08 | DR-4344-CA | Major disaster | Wildfires | Wildfire | $2,685,239.42 | ||
| 2017-10-09 | 2017-10-09 | FM-5223-CA | Fire management | Canyon 2 Fire | Wildfire | no Public Assistance recorded | same incident as DR-4344 | |
| 2017-09-26 | 2017-09-25 | FM-5213-CA | Fire management | Canyon Fire | Wildfire | no Public Assistance recorded | ||
| 2017-03-16 | 2017-01-18 | DR-4305-CA | Major disaster | Severe Winter Storms, Flooding, and Mudslides | Inland Flooding (primary); also designated: Landslide, Winter Weather | $4,108,333.72 | ||
| 2011-01-26 | 2010-12-17 | DR-1952-CA | Major disaster | Severe Winter Storms, Flooding, and Debris and Mud Flows | Inland Flooding (primary); also designated: Winter Weather | $11,846,048.30 | ||
| 2008-11-18 | 2008-11-13 | DR-1810-CA | Major disaster | Wildfires | Wildfire | $2,146,095.15 | ||
| 2008-11-15 | 2008-11-15 | FM-2792-CA | Fire management | Freeway Fire Complex | Wildfire | no Public Assistance recorded | same incident as DR-1810 | |
| 2007-10-24 | 2007-10-21 | DR-1731-CA | Major disaster | Wildfires, Flooding, Mud Flows, and Debris Flows | Wildfire | $2,547,928.83 | ||
| 2007-10-23 | 2007-10-21 | EM-3279-CA | Emergency | Wildfires | Wildfire | no Public Assistance recorded | same incident as DR-1731 | |
| 2007-10-22 | 2007-10-21 | FM-2737-CA | Fire management | Santiago Fire | Wildfire | no Public Assistance recorded | same incident as DR-1731 | |
| 2007-03-11 | 2007-03-11 | FM-2683-CA | Fire management | 241 Fire | Wildfire | no Public Assistance recorded | ||
| 2006-02-06 | 2006-02-06 | FM-2630-CA | Fire management | Sierra Fire | Wildfire | no Public Assistance recorded | ||
| 2005-09-13 | 2005-08-29 | EM-3248-CA | Emergency | Hurricane Katrina Evacuation | Hurricane: evacuation support, not a local hazard event; not counted | $1,214.70 | ||
| 2005-04-14 | 2005-02-16 | DR-1585-CA | Major disaster | Severe Storms, Flooding, Landslides, and Mud and Debris Flows | Inland Flooding; Landslide | $30,740,786.15 | ||
| 2005-02-04 | 2004-12-27 | DR-1577-CA | Major disaster | Severe Storms, Flooding, Debris Flows, and Mudslides | Inland Flooding; Landslide | $16,064,610.35 | ||
| 2002-05-14 | 2002-05-13 | FM-2405-CA | Fire management | Antonio Fire | Wildfire | no Public Assistance recorded | ||
| 1998-02-09 | 1998-02-02 | DR-1203-CA | Major disaster | Severe Winter Storms and Flooding | Inland Flooding; Winter Weather | no Public Assistance recorded | ||
| 1996-10-23 | 1996-10-21 | EM-3120-CA | Emergency | Severe Firestorms | Wildfire | no Public Assistance recorded | ||
| 1995-03-12 | 1995-02-13 | DR-1046-CA | Major disaster | Severe Winter Storms, Flooding Landslides, Mud Flow | Inland Flooding; Landslide; Winter Weather | no Public Assistance recorded | ||
| 1995-01-10 | 1995-01-03 | DR-1044-CA | Major disaster | Severe Winter Storms, Flooding, Landslides, Mud Flows | Inland Flooding; Landslide; Winter Weather | no Public Assistance recorded | ||
| 1994-01-17 | 1994-01-17 | DR-1008-CA | Major disaster | Northridge Earthquake | Earthquake | no Public Assistance recorded | ||
| 1993-10-28 | 1993-10-26 | DR-1005-CA | Major disaster | Fires, Mud/Landslides, Flooding, Soil Erosion | Wildfire (primary); also designated: Inland Flooding, Landslide | no Public Assistance recorded | ||
| 1993-02-03 | 1993-01-05 | DR-979-CA | Major disaster | Severe Winter Storm, Mud & Land Slides, & Flooding | Inland Flooding (primary); also designated: Landslide, Winter Weather | no Public Assistance recorded | ||
| 1992-02-25 | 1992-02-10 | DR-935-CA | Major disaster | Rain/Snow/Wind Storms, Flooding, Mudslides | Inland Flooding (primary); also designated: Landslide, Strong Wind, Winter Weather | no Public Assistance recorded | ||
| 1988-02-05 | 1988-01-17 | DR-812-CA | Major disaster | Severe Storms, High Tides & Flooding | Inland Flooding (primary); also designated: Coastal Flooding | no Public Assistance recorded | ||
| 1987-10-07 | 1987-10-01 | DR-799-CA | Major disaster | Earthquake & Aftershocks | Earthquake | PA not declared for this county | ||
| 1983-02-09 | 1983-01-21 | DR-677-CA | Major disaster | Coastal Storms, Floods, Slides & Tornadoes | Coastal Flooding; Inland Flooding; Landslide; Tornado | no Public Assistance recorded | ||
| 1982-04-24 | 1982-04-24 | DR-657-CA | Major disaster | Urban Fire | Wildfire | PA not declared for this county | ||
| 1980-11-27 | 1980-11-27 | DR-635-CA | Major disaster | Brush & Timber Fires | Wildfire | no Public Assistance recorded | ||
| 1980-02-21 | 1980-01-08 | DR-615-CA | Major disaster | Severe Storms, Mudslides & Flooding | Inland Flooding (primary); also designated: Landslide | no Public Assistance recorded | ||
| 1978-10-09 | 1978-10-09 | DR-566-CA | Major disaster | Landslides | Inland Flooding (primary); also designated: Landslide | no Public Assistance recorded | ||
| 1978-02-15 | 1978-02-15 | DR-547-CA | Major disaster | Coastal Storms, Mudslides & Flooding | Coastal Flooding (primary); also designated: Landslide | no Public Assistance recorded | ||
| 1969-01-26 | 1969-01-26 | DR-253-CA | Major disaster | Severe Storms & Flooding | Inland Flooding | no Public Assistance recorded |
School districts and special districts in this county: $25,554,968.15 (included in the county total above). Public Assistance matched by applicant name to the school districts and special districts FEMA lists as plan participants in this county. They have no row of their own in the jurisdiction table, so their total is listed here. These dollars are already included in the county PA column of the declarations table (the FEMA record places each applicant in this county), so this line is not added to it.
County Public Assistance: applicants the FEMA record places in this county, including any state agencies FEMA files there; statewide rows are listed on the state page; federal share obligated, nominal dollars.
Statewide declarations
Source: 2
| Declared | Incident began | FEMA number | Type | Title | Mapped hazard |
|---|---|---|---|---|---|
| 1964-04-01 | 1964-04-01 | DR-169-CA | Major disaster | Seismic Sea Wave | Tsunami |
| 1963-12-21 | 1963-12-21 | DR-161-CA | Major disaster | Flood Due to Broken Dam | Other, not an NRI hazard; not counted |
| 1963-02-25 | 1963-02-25 | DR-145-CA | Major disaster | Severe Storms, Heavy Rains & Flooding | Inland Flooding |
| 1962-10-24 | 1962-10-24 | DR-138-CA | Major disaster | Severe Storms & Flooding | Inland Flooding |
| 1962-03-06 | 1962-03-06 | DR-122-CA | Major disaster | Floods | Inland Flooding |
| 1961-11-16 | 1961-11-16 | DR-119-CA | Major disaster | Fire (Los Angeles County) | Wildfire |
| 1958-04-04 | 1958-04-04 | DR-82-CA | Major disaster | Heavy Rainstorms & Flood | Inland Flooding |
| 1956-12-29 | 1956-12-29 | DR-65-CA | Major disaster | Forest Fire | Wildfire |
| 1955-12-23 | 1955-12-23 | DR-47-CA | Major disaster | Flood | Inland Flooding |
| 1954-02-05 | 1954-02-05 | DR-15-CA | Major disaster | Flood & Erosion | Inland Flooding |
FEMA recorded these with designated area Statewide and no county, so they are listed on every county page in the state and not counted with county rows. Local data needed: whether each one affected this county.
5 Fire Management declarations (1977-08-07 to 1988-09-13) FEMA filed as Statewide with no county; each names one local fire. Listed on the state page.
Public Assistance filed under this county for declarations that do not list it: 1 row, $249,401.57
Sources: 2, 3
| FEMA number | Declared | Title | Applicant | PA obligatedfederal share obligated, nominal dollars |
|---|---|---|---|---|
| DR-4431-CA | 2019-05-01 | Severe Winter Storms, Flooding, Landslides, and Mudslides | Orange County Water District | $249,401.57 |
FEMA's Public Assistance summaries file these applicants under this county, but FEMA's declaration rows for these disasters do not designate it (an electric cooperative or district serving several counties, for example). Not in any declaration row above and not counted.
Previous occurrences by hazard, with explicit no-event rows
Sources: 2, 6, 7
| Hazard | Storm Events records, all years on file(years in the Period column) | Since plan approvalrecords | In the 12 months before plan approvalrecords | Last 5 yearsrecords | Declared incidents, all yearsseparate disasters | Declared since approvalseparate disasters | Period | Statement |
|---|---|---|---|---|---|---|---|---|
| Avalanche | 0 | 0 | 0 | 0 | 0 | 0 | 1996 to 2026-06-30 | No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events |
| Coastal Flooding | 14 | 4 | 0 | 4 | 3 | 0 | 1996 to 2026-06-30 | |
| Cold Wave | 2 | 1 | 0 | 1 | 0 | 0 | 1996 to 2026-06-30 | Includes 2 Frost/Freeze records. |
| Drought | 26 | 0 | 0 | 0 | 0 | 0 | 1996 to 2026-06-30 | |
| Earthquake | 0 | 0 | 0 | 0 | 2 | 0 | Storm Events does not record earthquakes; the USGS earthquake catalog is the source. | |
| Hail | 13 | 0 | 0 | 0 | 0 | 0 | 1955 to 2026-06-30 | |
| Heat Wave | 51 | 17 | 8 | 19 | 0 | 0 | 1996 to 2026-06-30 | |
| Hurricane | 1 | 1 | 0 | 1 | 0 | 0 | 1996 to 2026-06-30 | |
| Inland Flooding | 138 | 40 | 11 | 46 | 17 | 2 | 1996 to 2026-06-30 | |
| Landslide | 13 | 3 | 2 | 3 | 14 | 2 | 1996 to 2026-06-30 | |
| Lightning | 4 | 0 | 0 | 0 | 0 | 0 | 1996 to 2026-06-30 | |
| Strong Wind | 261 | 48 | 11 | 56 | 1 | 0 | 1955 to 2026-06-30 | Includes 195 High Wind and 28 Strong Wind records. |
| Tornado | 31 | 0 | 0 | 0 | 1 | 0 | 1950 to 2026-06-30 | |
| Tsunami | 3 | 2 | 0 | 2 | 0 | 0 | 1996 to 2026-06-30 | |
| Wildfire | 40 | 7 | 1 | 7 | 15 | 1 | 1996 to 2026-06-30 | |
| Winter Weather | 10 | 2 | 0 | 2 | 9 | 2 | 1996 to 2026-06-30 |
Notable Storm Events records
Sources: 1, 6, 7
| Date | Event type | Magnitude or extent | Damagenominal dollars | Deaths, injuriesdirect only | Location | Flags | Why listed |
|---|---|---|---|---|---|---|---|
| 2026-06-09 | Storm Surge/Tide | $0 property; $0 crops, reported for the zone (2026 dollars) | 1, 0 | NWS zone CAZ552 (ORANGE COUNTY COASTAL), zone-level | new since last plan; within last 5 years | deaths or injuries recorded | |
| 2023-07-11 | Excessive Heat | $0 property; $0 crops, reported for the zone (2023 dollars) | 0, 0 | NWS zone CAZ554 (ORANGE COUNTY INLAND), zone-level | new since last plan; within last 5 years | B1-c worst recorded: Excessive Heat, Heat | |
| 2022-05-11 | Wildfire | $60,000,000 property; $0 crops, reported for the zone (2022 dollars) | 0, 0 | NWS zone CAZ552 (ORANGE COUNTY COASTAL), zone-level | new since last plan; within last 5 years | B1-c worst recorded: Wildfire | |
| 2010-12-19 | Flood | $36,000,000 property; $0 crops (2010 dollars) | 0, 0 | SAN CLEMENTE to SUNSET BEACH | B1-c worst recorded: Flash Flood, Flood, Lakeshore Flood | ||
| 2010-01-19 | Thunderstorm Wind | 81 kt (93 mph) measured gust | $350,000 property; $0 crops (2010 dollars) | 0, 0 | COSTA MESA to NEWPORT BEACH | B1-c worst recorded: Thunderstorm Wind | |
| 2005-02-20 | Debris Flow | $300,000 property; crops not reported, reported for the zone (2005 dollars) | 1, 0 | NWS zone CAZ057 (NE ORANGE), zone-level | deaths or injuries recorded | ||
| 2001-01-09 | Storm Surge/Tide | $240,000 property; crops not reported (2001 dollars) | 0, 0 | SEAL BEACH | B1-c worst recorded: Coastal Flood, Storm Surge/Tide | ||
| 2000-03-03 | Lightning | $50,000 property; crops not reported (2000 dollars) | 0, 0 | NEWPORT BEACH | B1-c worst recorded: Lightning | ||
| 1999-12-03 | High Wind | 104 kt (120 mph), measurement type not recorded | $20,000 property; crops not reported, reported for the zone (1999 dollars) | 0, 0 | NWS zone CAZ057 (SANTA ANA MOUNTAINS AND FOOTHILLS), zone-level | B1-c worst recorded: High Wind and Strong Wind | |
| 1998-02-23 | Flash Flood | $29,700,000 property; $280,000 crops (1998 dollars) | 2, 2 | COUNTYWIDE | deaths or injuries recorded | ||
| 1979-01-31 | Hail | 2 in | damage not recorded (pre-1996 record) | 0, 0 | location not recorded | B1-c worst recorded: Hail | |
| 1978-02-09 | Tornado | F3, 2 mi path length (whole path, pre-1996), 67 yd wide | $2,500,000 property; crops not recorded (1978 dollars) | 0, 6 | location not recorded | B1-c worst recorded: Tornado |
The full list is in the Excel file, sheet "B1-d Storm Events history" (607 rows).
Location is the place NOAA recorded, as written in its data; it need not be a jurisdiction in this plan.
Local data needed: state-declared emergencies, from your state emergency management agency (federal data do not include them).
Tribal and special-area declarations in this state are listed on the state page.
Supports FEMA checklist item B1-e: probability of future events
Probability: FEMA annualized frequency and descriptor per hazard
Sources: 5, 6
| Hazard | FEMA annualized frequency (modeled)unit per row | Unit | In plain terms | Descriptor | Descriptor basis | NRI events or days in its record period (hail, wind and tornado are area-weighted, so can be fractional) | NRI period | Location | Note |
|---|---|---|---|---|---|---|---|---|---|
| Avalanche | 0.01 | events per year | about 1 in 100 years | Possible | FEMA annualized frequency (modeled) | 0 | 1994 to 2023 (30 years) | see B1-f | 0.01 is NRI's minimum avalanche frequency for a county in an avalanche susceptibility zone; NRI records no avalanche here, so the descriptor reflects the floor, not local events. |
| Coastal Flooding | 2.13 | events per year at a location (modeled) | about 2.1 per year at a given location in the county | Highly likely | FEMA annualized frequency (modeled) | not shown | modeled | see B1-f | Descriptor from NRI: the rate at a location is 1 or more a year, so the county rate is at least that. |
| Cold Wave | 0 | event-days per year | none modeled | event-days in 0 of 30 years, 1996 to 2025 (0%) | 0 | 2005-11-12 to 2024-11-12 (19 years) | countywide | No Storm Events cold wave record, 1996 to 2025. | |
| Drought | 62.6 | event-days per year | about 62.6 days per year | Likely (from Storm Events: 3 of 30 years) | event-days in 3 of 30 years, 1996 to 2025 (10%) | 2,569 | 2000 to 2025 (25.25 years; D3 and D4 only) | countywide | |
| Earthquake | 0.0975 | annual probability at a location | chance a given location in the county has at least minor-damage shaking in a year: 9.75% | not shown | modeled | see B1-f | No descriptor (Storm Events does not record earthquakes). | ||
| Hail | 0.104 | events per year | about 1 in 10 years | Likely | FEMA annualized frequency (modeled) | 4.0 (modeled) | 1986 to 2023 (38 years) | countywide | |
| Heat Wave | 7.41 | event-days per year | about 7.41 days per year | Likely (from Storm Events: 13 of 30 years) | event-days in 13 of 30 years, 1996 to 2025 (43.3%) | 81.2 | 2005-11-12 to 2024-11-12 (19 years) | countywide | |
| Hurricane | 0 | events per year | none modeled | Unlikely | FEMA annualized frequency (modeled) | 0 | 1851 to 2024 (Atlantic); 1949 to 2024 (Pacific) | see B1-f | NRI counts hurricane and tropical storm tracks passing within storm-force wind range; federal declarations are in B1-d. |
| Inland Flooding | 2.89 | event-days per year | about 2.89 days per year | Likely (from Storm Events: 25 of 30 years) | event-days in 25 of 30 years, 1996 to 2025 (83.3%) | 81 | 1996 to 2023 (28 years) | see B1-f | |
| Landslide | 17.8 | events per year (modeled) | about 17.8 per year | Highly likely | FEMA annualized frequency (modeled) | not shown | modeled | see B1-f | |
| Lightning | 7.43 | days per year with a strike | about 7.43 days per year | Highly likely | FEMA annualized frequency (modeled) | not shown | 1995 to 2023 (29 years; CONUS) | countywide | |
| Strong Wind | 0.175 | events per year | about 1 in 6 years | Likely | FEMA annualized frequency (modeled) | 6 | 1986 to 2023 (38 years) | countywide | |
| Tornado | 0.129 | events per year | about 1 in 8 years | Likely | FEMA annualized frequency (modeled) | not shown | 1950 to 2023 (EF2+); 1986 to 2023 (EF0-1) | see B1-f | |
| Tsunami | 0.388 | annual probability at the most exposed location (used in place of a county value) | chance at the county's most exposed location in a year: 38.8% | Likely (from Storm Events: 3 of 30 years) | Storm Events records in 3 of 30 years, 1996 to 2025 (10%) | not shown | modeled | see B1-f | Descriptor from Storm Events, not NRI. |
| Wildfire | 0.0107 | annual probability at a location | chance a given location in the county burns in a year: 1.07% | Likely (from Storm Events: 18 of 30 years) | Storm Events records in 18 of 30 years, 1996 to 2025 (60%) | not shown | modeled | see B1-f | Descriptor from Storm Events, not NRI. |
| Winter Weather | 0.201 | event-days per year | about 0.201 days per year | Likely (from Storm Events: 7 of 30 years) | event-days in 7 of 30 years, 1996 to 2025 (23.3%) | 3.19 | 2005-11-12 to 2024-11-12 (19 years) | countywide |
FEMA annualized frequency (modeled) is the National Risk Index v1.20 (December 2025) estimate of how often a hazard affects this county in a year; it is not recorded events divided by years, and its unit differs by hazard (events, event-days, or days with a lightning strike per year). For earthquake, wildfire, coastal flooding and tsunami the value is the chance (or number of events) at a location in the county, not across the county, so no "1 in N years" is given and the descriptor comes from Storm Events where it has a record (none for earthquake). The Methods page gives each hazard's method, from FEMA's National Risk Index Technical Documentation v1.20.
Where NRI gives event-days, the descriptor comes from the share of years with a Storm Events record; NRI's source records more events, so the two differ.
Descriptor scale used in this packet (defined per unit)
Sources: 5, 6
| Unit | Descriptor | Definition |
|---|---|---|
| events per year | Highly likely | 1 or more per year |
| events per year | Likely | about once in 1 to 10 years |
| events per year | Possible | about once in 10 to 100 years |
| events per year | Unlikely | less than once in 100 years |
| annual probability | Likely | 10% to under 100% chance in a given year |
| annual probability | Possible | 1% to under 10% chance in a given year |
| annual probability | Unlikely | under 1% chance in a given year |
| event-days (share of years) | Highly likely | event-days recorded in 90% or more of years |
| event-days (share of years) | Likely | event-days recorded in 10% to under 90% of years |
| event-days (share of years) | Possible | event-days recorded in some years but under 10% of years |
| lightning strike-days | Highly likely | cloud-to-ground strikes on 1 or more days per year |
Intensity bands: historical frequency (Storm Events)
Source: 6
| Hazard | Band | Years | Eventscounty-coded records | Years in period | Events per yearevents / years |
|---|---|---|---|---|---|
| Hail | 1.00-1.99 in | 1996 to 2025 | 4 | 30 | 0.133 |
| Hail | 2.00 in+ | 1996 to 2025 | 0 | 30 | 0 |
| Thunderstorm Wind (counted as NRI Strong Wind) | 50-64 kt | 1996 to 2025 | 15 | 30 | 0.5 |
| Thunderstorm Wind (counted as NRI Strong Wind) | 65 kt+ | 1996 to 2025 | 6 | 30 | 0.2 |
| Thunderstorm Wind (counted as NRI Strong Wind) | unmeasured or below 50 kt | 1996 to 2025 | 10 | 30 | 0.333 |
| Tornado | EF0-1 | 1996 to 2025 | 7 | 30 | 0.233 |
| Tornado | EF2-3 | 1996 to 2025 | 0 | 30 | 0 |
| Tornado | EF4-5 | 1996 to 2025 | 0 | 30 | 0 |
| Tornado | unrated (EFU) | 1996 to 2025 | 0 | 30 | 0 |
The bands show how often events of each severity were recorded in this county, to profile how severe events have been (FEMA's probability item asks for the range of intensities).
Hail smaller than 1 inch is not counted: on 2010-01-05 the National Weather Service raised its severe-hail threshold from 3/4 inch to 1 inch, so smaller reports became less common after 2009 (NWS Service Change Notice 09-52). NRI hail frequency uses a 0.75 inch threshold.
Optional: future conditions. Not a required item in the 2025 FEMA Local Mitigation Planning Policy Guide; some states ask for it. The federal Climate Mapping for Resilience and Adaptation (CMRA) site gives county exposure to future climate conditions (https://resilience.climate.gov/).
Supports FEMA checklist item B1-f: hazards that vary across jurisdictions
Range of census tract risk within the county
Source: 5
| Hazard | Tractsrated of all | NRI risk score, 0 to 100 | Tracts by rating | ||
|---|---|---|---|---|---|
| Min | Median | Max | |||
| Avalanche | 3 of 613 | 4.7 | 5.0 | 5.5 | Very Low 3, Not Applicable 610 |
| Coastal Flooding | 90 of 613 | 69.6 | 83.0 | 99.9 | Very High 2, Relatively High 6, Relatively Moderate 10, Relatively Low 50, Very Low 22, No Rating 523 |
| Cold Wave | 0 of 613 | No Rating 613 | |||
| Drought | 43 of 613 | 66.9 | 74.2 | 89.6 | Relatively Low 3, Very Low 40, No Rating 570 |
| Earthquake | 613 of 613 | 74.6 | 92.3 | 100.0 | Very High 77, Relatively High 400, Relatively Moderate 134, Relatively Low 2 |
| Hail | 613 of 613 | 2.8 | 24.2 | 57.4 | Relatively Low 32, Very Low 581 |
| Heat Wave | 613 of 613 | 1.8 | 23.8 | 73.8 | Relatively Moderate 7, Relatively Low 409, Very Low 197 |
| Hurricane | 0 of 613 | No Rating 613 | |||
| Inland Flooding | 613 of 613 | 3.3 | 74.3 | 100.0 | Very High 84, Relatively High 186, Relatively Moderate 212, Relatively Low 117, Very Low 14 |
| Landslide | 574 of 613 | 8.9 | 60.6 | 99.9 | Very High 1, Relatively High 14, Relatively Moderate 46, Relatively Low 111, Very Low 402, No Rating 39 |
| Lightning | 612 of 613 | 0.4 | 4.0 | 33.8 | Relatively Low 1, Very Low 611, No Rating 1 |
| Strong Wind | 613 of 613 | 1.7 | 9.5 | 29.1 | Relatively Low 3, Very Low 610 |
| Tornado | 613 of 613 | 2.9 | 18.6 | 48.9 | Relatively Low 33, Very Low 580 |
| Tsunami | 55 of 613 | 12.3 | 40.7 | 88.7 | Relatively Moderate 3, Relatively Low 19, Very Low 33, No Rating 12, Not Applicable 546 |
| Wildfire | 260 of 613 | 18.6 | 73.7 | 100.0 | Very High 14, Relatively High 27, Relatively Moderate 38, Relatively Low 63, Very Low 118, No Rating 353 |
| Winter Weather | 23 of 613 | 10.5 | 10.6 | 15.8 | Very Low 23, No Rating 590 |
Drought: Agriculture is all of NRI's expected annual loss for this hazard in the county, so the tract range mostly reflects where crop and livestock value is.
Rated tracts only: No Rating (score 0.0), Not Applicable and Insufficient Data tracts are counted but not used for the minimum, median and maximum.
The score ranks a tract against all U.S. tracts (100 = highest). The rating is FEMA's category for the tract's risk value, computed differently, so the two can disagree.
Frequency data for drought, hail, heat wave, lightning, strong wind and winter weather are county-wide or coarse (49 km grid or NWS zone), the same for every jurisdiction; the tract range mostly reflects where buildings and people are (crop and livestock value where a line above names agriculture).
Each jurisdiction (starting figures from federal data)
Sources: 1, 3, 4, 6
| Jurisdiction | Type | Plan status | Repetitive lossFMA RL and SRL (44 CFR 77.2); repeat-flood, any definition | Public Assistance to this jurisdictionFEMA records matched by applicant name; federal share obligated, nominal dollars | Event records naming this placeall years; since its plan | Notes |
|---|---|---|---|---|---|---|
| Orange County | County | Approved, expires 2026-12-26 | FMA RL 0, SRL 0; any 11 | $180,664,202.60 | 0 total; 0 since its plan | Includes $173,716,030.32 for declarations not counted as hazard incidents (DR-4482-CA, EM-3248-CA). |
| Aliso Viejo city | City | Approved, expires 2029-07-17 | FMA RL 0, SRL 0; any 0 | $45,308.85 | 0 total; 0 since its plan | |
| Anaheim city | City | Approved, expires 2027-09-05 | FMA RL 0, SRL 0; any 0 | $3,939,002.96 | 5 total; 0 since its plan | Includes $606,168.07 for declarations not counted as hazard incidents (DR-4482-CA). |
| Brea city | City | Approved, expires 2029-10-29 | FMA RL 0, SRL 0; any 0 | $475,654.56 | 3 total; 0 since its plan | Includes $121,520.22 for declarations not counted as hazard incidents (DR-4482-CA). |
| Buena Park city | City | Approved, expires 2027-12-19 | FMA RL 0, SRL 0; any 0 | $503,510.73 | 1 total; 1 since its plan | Includes $503,510.73 for declarations not counted as hazard incidents (DR-4482-CA). |
| Costa Mesa city | City | Approved, expires 2028-04-17 | FMA RL 1, SRL 1; any 4 | $1,431,853.35 | 7 total; 0 since its plan | Includes $1,335,061.03 for declarations not counted as hazard incidents (DR-4482-CA). |
| Dana Point city | City | Approved, expires 2030-02-04 | FMA RL 0, SRL 1; any 1 | $530,452.72 | 0 total; 0 since its plan | Includes $186,403.49 for declarations not counted as hazard incidents (DR-4482-CA). |
| Fountain Valley city | City | Approved, expires 2030-11-09 | FMA RL 0, SRL 0; any 1 | $126,043.66 | 0 total; 0 since its plan | Includes $119,798.87 for declarations not counted as hazard incidents (DR-4482-CA). |
| Fullerton city | City | Approved, expires 2031-07-08 | FMA RL 0, SRL 0; any 2 | $374,886.45 | 2 total; not yet covered | Includes $208,207.90 for declarations not counted as hazard incidents (DR-4482-CA). |
| Garden Grove city | City | Expired on 2025-09-17 | FMA RL 0, SRL 1; any 5 | $17,011.38 | 7 total; 0 since its plan | |
| Huntington Beach city | City | Approved, expires 2028-01-13 | FMA RL 0, SRL 0; any 8 | $4,722,413.37 | 15 total; 4 since its plan | Includes $4,258,379.06 for declarations not counted as hazard incidents (DR-4482-CA). |
| Irvine city | City | No approved plan on record. Approvable pending adoption, not yet eligible | FMA RL 0, SRL 0; any 0 | $2,040,125.30 | 9 total; no approved plan | Includes $1,532,458.90 for declarations not counted as hazard incidents (DR-4482-CA). |
| La Habra city | City | Expired on 2025-04-13 | FMA RL 0, SRL 0; any 0 | $112,454.08 | 1 total; 0 since its plan | |
| La Palma city | City | Expired on 2025-04-16 | FMA RL 0, SRL 0; any 0 | no Public Assistance recorded | 0 total; 0 since its plan | |
| Laguna Beach city | City | Approved, expires 2028-12-21 | FMA RL 8, SRL 6; any 31 | $25,533,428.36 | 9 total; 0 since its plan | Includes $181,216.19 for declarations not counted as hazard incidents (DR-4482-CA). |
| Laguna Hills city | City | Approved, expires 2030-04-14 | FMA RL 0, SRL 0; any 0 | $10,081.37 | 5 total; 0 since its plan | |
| Laguna Niguel city | City | Approved, expires 2029-01-22 | FMA RL 0, SRL 0; any 0 | $438,076.82 | 0 total; 0 since its plan | Includes $86,894.62 for declarations not counted as hazard incidents (DR-4482-CA). |
| Laguna Woods city | City | Expired on 2018-05-27 | FMA RL 0, SRL 0; any 0 | $8,027.29 | 0 total; 0 since its plan | Includes $8,027.29 for declarations not counted as hazard incidents (DR-4482-CA). |
| Lake Forest city | City | Approved, expires 2029-09-05 | FMA RL 0, SRL 0; any 0 | $215,264.26 | 3 total; 0 since its plan | |
| Mission Viejo city | City | Approved, expires 2030-04-14 | FMA RL 0, SRL 0; any 1 | $2,603,062.72 | 9 total; 0 since its plan | Includes $497,629.51 for declarations not counted as hazard incidents (DR-4482-CA). |
| Newport Beach city | City | Expired on 2021-09-26 | FMA RL 0, SRL 0; any 8 | $518,699.06 | 8 total; 1 since its plan | |
| Orange city | City | Approved, expires 2031-05-06 | FMA RL 0, SRL 0; any 0 | $499,346.61 | 3 total; 0 since its plan | Includes $85,269.27 for declarations not counted as hazard incidents (DR-4482-CA). |
| Placentia city | City | Approved, expires 2029-07-17 | FMA RL 0, SRL 0; any 0 | $70,418.26 | 4 total; 0 since its plan | Includes $57,758.26 for declarations not counted as hazard incidents (DR-4482-CA). |
| Rancho Santa Margarita city | City | Approved, expires 2030-07-15 | FMA RL 0, SRL 0; any 0 | $75,270.04 | 0 total; 0 since its plan | |
| San Clemente city | City | Approved, expires 2030-04-14 | FMA RL 1, SRL 1; any 5 | $1,239,849.91 | 17 total; 0 since its plan | |
| San Juan Capistrano city | City | Expired on 2025-04-22 | FMA RL 0, SRL 0; any 1 | $4,658,465.26 | 2 total; 1 since its plan | |
| Santa Ana city | City | Approved, expires 2028-02-06 | FMA RL 0, SRL 0; any 7 | $886,781.12 | 8 total; 2 since its plan | Includes $381,590.90 for declarations not counted as hazard incidents (DR-4482-CA). |
| Seal Beach city | City | Approved, expires 2030-11-16 | FMA RL 0, SRL 1; any 13 | $75,688.93 | 11 total; 0 since its plan | |
| Stanton city | City | Approved, expires 2028-04-17 | FMA RL 0, SRL 0; any 0 | no Public Assistance recorded | 0 total; 0 since its plan | |
| Tustin city | City | Expired on 2024-11-06 | FMA RL 0, SRL 0; any 0 | $131,406.99 | 7 total; 3 since its plan | Includes $87,666.32 for declarations not counted as hazard incidents (DR-4482-CA). |
| Villa Park city | City | Expired on 2026-07-13 | FMA RL 0, SRL 0; any 0 | $305,655.37 | 1 total; 0 since its plan | Includes $11,663.17 for declarations not counted as hazard incidents (DR-4482-CA). |
| Westminster city | City | Expired on 2021-05-13 | FMA RL 0, SRL 0; any 3 | $134,366.70 | 2 total; 2 since its plan | Includes $125,791.68 for declarations not counted as hazard incidents (DR-4482-CA). |
| Yorba Linda city | City | Approved, expires 2028-10-22 | FMA RL 0, SRL 0; any 0 | $940,207.59 | 12 total; 0 since its plan |
Repetitive-loss counts are for whole NFIP communities, which can extend beyond this county (see the note in B2-c).
School districts and special districts get a plan clock row only.
County Public Assistance in B1-d also includes applicants filed under the county that are not jurisdictions in this plan (for example state agencies, special districts and nonprofits), so the jurisdiction rows add up to less.
Supports FEMA checklist items B2-a and B2-b: vulnerability and potential impacts
Local data needed
The table below gives county-level starting figures; the plan describes impacts for each jurisdiction and its own assets.
- Critical facilities and lifelines per hazard
- A problem statement per jurisdiction per hazard
- Changes in development in hazard-prone areas since the last approval, or a statement of none (E1-a)
- Future assets
County-level starter: exposure, expected annual loss and damage since the plan
Sources: 1, 2, 3, 5, 6, 7
| Hazard | Building exposuremodeled dollars | Agriculture exposuremodeled dollars | Population exposedpeople | EAL buildingsmodeled dollars per year | EAL agriculturemodeled dollars per year | Cost of expected deaths and injuriesFEMA's dollar value per year, not property damage | EAL as % of exposurebuildings; agriculture where noted | Storm Events damage since 2021-12-27county-coded records, property plus crops, nominal dollars | Zone-level damage since planproperty plus crops, reported for the zone | Public Assistance since plannominal dollars; see note | Note |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Avalanche | $2,115,116 | n/a | under 1 | $2 | n/a | $14 | 0.000105% | ||||
| Coastal Flooding | $227,200,148,733 | n/a | 1,407,001 | $8,410,595 | n/a | $2,542 | 0.0037% | $0 | |||
| Cold Wave | $0 | $0 | 0 | $0 | $0 | $0 | $0 | building exposure is 0 in NRI | |||
| Drought | n/a | $104,082,934 | n/a | n/a | $36,627 | n/a | 0.0352% (agriculture) | NRI has no building exposure for this hazard; agriculture shown | |||
| Earthquake | $1,036,878,807,347 | n/a | 3,186,989 | $706,143,269 | n/a | $309,194,322 | 0.0681% | ||||
| Hail | $606,399,782,637 | $106,232,076 | 3,183,647 | $900,264 | $441 | $36,678 | 0.000148% | ||||
| Heat Wave | $606,392,893,807 | $106,232,076 | 3,183,636 | $5,894 | $6,845 | $11,014,018 | under 0.0001% | $0 | |||
| Hurricane | $606,399,782,637 | $106,232,076 | 3,183,647 | $0 | $0 | $0 | 0% | $0 | |||
| Inland Flooding | $605,852,900,878 | $5,118,118 | 104,939 | $818,458,922 | $42,587 | $1,429,482 | n/a (see note) | $10,000 | no Public Assistance recorded (2 declarations) | NRI counts the full building value of any census block with some flood loss; this is not the value of buildings in the floodplain. Use local FIRM overlays for B2-a/B2-b. | |
| Landslide | $19,882,297,040 | n/a | 78,135 | $942,120 | n/a | $3,237,130 | 0.00474% | $30,000 | no Public Assistance recorded (2 declarations) | ||
| Lightning | $606,399,782,637 | n/a | 3,183,647 | $5,801 | n/a | $482,869 | under 0.0001% | ||||
| Strong Wind | $606,399,782,637 | $106,232,076 | 3,183,647 | $339,316 | $1,650 | $311,609 | under 0.0001% | $2,000 | $74,000 | Storm Events damage since the plan includes 1 zone-level High Wind record ($40,000) and 7 zone-level Strong Wind records ($34,000): NOAA non-thunderstorm wind types, outside NRI's Strong Wind definition. | |
| Tornado | $606,399,782,637 | $106,232,076 | 3,183,647 | $3,429,754 | $610 | $1,917,996 | 0.000566% | ||||
| Tsunami | $38,426,334,141 | n/a | 75,685 | $2,529,600 | n/a | $0 | 0.00658% | $0 | |||
| Wildfire | $16,625,760,768 | $74,070,839 | 112,865 | $54,812,095 | $3,585 | $2,769,945 | 0.33% | $110,140,000 | no Public Assistance recorded (1 declaration) | ||
| Winter Weather | $1,500,418,974 | $260,659 | 5,810 | $2 | under $1 | $131 | under 0.0001% | $0 | no Public Assistance recorded (2 declarations) |
Totals since 2021-12-27 (Storm Events through 2026-06-30): 47 county-coded records, 45 with a damage value recorded (including $0), $42,000; 78 zone-level records, 72 with a damage value recorded (including $0), $110,214,000 reported for the zone; Public Assistance: none recorded on the 3 counted declarations.
FEMA does not split Public Assistance by hazard. A declaration mapped to several hazards is listed under each of them with its full amount, so the per-hazard column does not add up to the total; the unit total counts each declaration once.
NRI computes earthquake exposure on its own basis, so it exceeds the county building value in B2-a.
Supports FEMA checklist item B2-a: vulnerability (county context)
County context
Source: 5
| Measure | Value |
|---|---|
| Population | 3,183,647 |
| Building value (total, not at risk) | $606,399,782,637 |
| Agriculture value (total, not at risk) | $106,232,076 |
| NRI risk rating (all hazards) | Very High |
| Expected annual loss, buildings and agriculture, all hazards | $1,596,069,979 |
| Expected annual loss, population equivalence, all hazards (NRI values each statistical life at $13.7M; a modeled value of expected deaths and injuries, not property damage) | $330,396,735 |
| Social vulnerability rating | Relatively Low |
| Community resilience rating | Very Low |
| NRI version | December 2025 |
FEMA's all-hazard expected annual loss adds buildings, agriculture and population equivalence; this table gives the property part and the population-equivalence part as separate rows.
Social vulnerability: higher means people are more likely to be harmed and slower to recover. Community resilience: lower means the community is less able to recover. High social vulnerability and low resilience both raise the NRI risk rating.
Supports FEMA checklist item B2-c: repetitive loss properties
Repetitive loss in this county, both definitions
Sources: 1, 4
| Definition | Properties | Severe repetitive loss | Properties |
|---|---|---|---|
| Repetitive loss, FMA definition (44 CFR 77.2) | 10 | Severe repetitive loss, FMA definition (44 CFR 77.2) | 11 |
| Repetitive loss, NFIP insurance definition | 100 | Severe repetitive loss, NFIP insurance definition | 9 |
The state NFIP coordinator's list, the source FEMA's Handbook names, often uses the NFIP insurance definition (second row).
Repeat-flood properties: county and state-level rows
Sources: 1, 4
| Scope | RL, FMAproperties | SRL, FMAproperties | RL, NFIPproperties | SRL, NFIPproperties | Any categoryproperties | Mitigatedproperties | Currently insuredproperties |
|---|---|---|---|---|---|---|---|
| County total | 10 | 11 | 100 | 9 | 103 | 0 | 30 |
| of which: Orange County (unincorporated area) | 0 | 0 | 11 | 0 | 11 | 0 | 0 |
| of which: Costa Mesa city | 1 | 1 | 4 | 1 | 4 | 0 | 2 |
| of which: Fountain Valley city | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| of which: Fullerton city | 0 | 0 | 2 | 0 | 2 | 0 | 2 |
| of which: Garden Grove city | 0 | 1 | 5 | 1 | 5 | 0 | 1 |
| of which: Laguna Beach city | 8 | 6 | 28 | 5 | 31 | 0 | 10 |
| of which: Newport Beach city | 0 | 0 | 8 | 0 | 8 | 0 | 1 |
| of which: San Clemente city | 1 | 1 | 5 | 0 | 5 | 0 | 2 |
| of which: San Juan Capistrano city | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
| of which: Santa Ana city | 0 | 0 | 7 | 0 | 7 | 0 | 2 |
| of which: Seal Beach city | 0 | 1 | 13 | 1 | 13 | 0 | 5 |
| of which: Westminster city | 0 | 0 | 3 | 0 | 3 | 0 | 0 |
| of which: Mission Viejo city | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| of which: Dana Point city | 0 | 1 | 1 | 1 | 1 | 0 | 1 |
| of which: Huntington Beach city | 0 | 0 | 8 | 0 | 8 | 0 | 3 |
| of which: Unknown (community ID Unknown in FEMA data) | 0 | 0 | 2 | 0 | 2 | 0 | 0 |
| Statewide, no county in FEMA's file | 0 | 1 | 3 | 0 | 4 | 1 | 0 |
The statewide row counts properties FEMA's file gives with no county in this state; they are listed for reference and are not in this county's counts.
Repeat-flood properties by jurisdiction in the plan (NFIP community)
Sources: 1, 4
| Jurisdiction | NFIP community ID | RL, FMAproperties | SRL, FMAproperties | RL, NFIPproperties | SRL, NFIPproperties | Any categoryproperties | Mitigatedproperties | Currently insuredproperties |
|---|---|---|---|---|---|---|---|---|
| Orange County | 060212 | 0 | 0 | 11 | 0 | 11 | 0 | 0 |
| Aliso Viejo city | 060770 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Anaheim city | 060213 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Brea city | 060214 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Buena Park city | 060215 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Costa Mesa city | 060216 | 1 | 1 | 4 | 1 | 4 | 0 | 2 |
| Dana Point city | 060736 | 0 | 1 | 1 | 1 | 1 | 0 | 1 |
| Fountain Valley city | 060218 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Fullerton city | 060219 | 0 | 0 | 2 | 0 | 2 | 0 | 2 |
| Garden Grove city | 060220 | 0 | 1 | 5 | 1 | 5 | 0 | 1 |
| Huntington Beach city | 065034 | 0 | 0 | 8 | 0 | 8 | 0 | 3 |
| Irvine city | 060222 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| La Habra city | 060224 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| La Palma city | 060225 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Laguna Beach city | 060223 | 8 | 6 | 28 | 5 | 31 | 0 | 10 |
| Laguna Hills city | 060760 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Laguna Niguel city | 060764 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Laguna Woods city | 060768 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lake Forest city | 060759 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Mission Viejo city | 060735 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Newport Beach city | 060227 | 0 | 0 | 8 | 0 | 8 | 0 | 1 |
| Orange city | 060228 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Placentia city | 060229 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rancho Santa Margarita city | 060769 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| San Clemente city | 060230 | 1 | 1 | 5 | 0 | 5 | 0 | 2 |
| San Juan Capistrano city | 060231 | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
| Santa Ana city | 060232 | 0 | 0 | 7 | 0 | 7 | 0 | 2 |
| Seal Beach city | 060233 | 0 | 1 | 13 | 1 | 13 | 0 | 5 |
| Stanton city | 060234 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Tustin city | 060235 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Villa Park city | 060236 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Westminster city | 060237 | 0 | 0 | 3 | 0 | 3 | 0 | 0 |
| Yorba Linda city | 060238 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Counts by occupancy group for each jurisdiction are in the Excel file, sheet "B2-c Jurisdictions".
Jurisdiction rows are whole NFIP communities and need not add up to the county total: a community that extends into another county is counted in full on each jurisdiction row, while the county table counts only its part in this county.
County repeat-flood properties by occupancy group
Sources: 1, 4
| Occupancy group | RL, FMAproperties | SRL, FMAproperties | RL, NFIPproperties | SRL, NFIPproperties | Any categoryproperties | Mitigatedproperties | Currently insuredproperties |
|---|---|---|---|---|---|---|---|
| single-family residential | 8 | 8 | 71 | 6 | 74 | 0 | 22 |
| 2 to 4 unit residential | 0 | 0 | 11 | 0 | 11 | 0 | 2 |
| other residential | 0 | 0 | 6 | 0 | 6 | 0 | 0 |
| non-residential | 2 | 3 | 12 | 3 | 12 | 0 | 6 |
| not reported | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
FEMA's occupancy groups have no institutional class; institutional properties are counted in non-residential or other residential in the table by occupancy group.
FMA RL and FMA SRL are the Flood Mitigation Assistance definitions (44 CFR 77.2), the ones the FEMA Local Mitigation Planning Policy Guide cites. NFIP repetitive loss (the FEMA insurance definition) is 2 or more claims over $1,000 in 10 years, and a property can leave that group once it is mitigated. Also shown: NFIP severe repetitive loss, any category, mitigated and currently insured. The Methods page gives the OpenFEMA field details.
Counts are aggregates of FEMA's public NFIP Multiple Loss Properties file (FEMA's data date 2026-08-02; file version 2026-08-04). No property is identified. County assignment is FEMA's geocode.
In this county 3 properties are FMA repetitive loss but not NFIP repetitive loss, and 93 properties are NFIP repetitive loss but not FMA repetitive loss.
Exact counts; no count suppression.
Sources
Tables cite these sources by number. The full list, for the plan's bibliography (FEMA review item A4-a):
- FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-29T134039Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)
- FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-29T162832Z, pulled 2026-09-30, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)
- FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-29T150754Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries (API)
- FEMA, OpenFEMA NfipMultipleLossProperties v1, version 2026-08-04T164045Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/NfipMultipleLossProperties (API)
- FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-30, https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_Counties.zip (download, 25 MB), https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_CensusTracts.zip (download, 635 MB)
- NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-30, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/
- NOAA National Weather Service, NWS county-public forecast zones correlation file, version bp03mr20 to bp16ap26 (11 files; newest bp16ap26), pulled 2026-09-30, https://www.weather.gov/gis/ZoneCounty
- U.S. Census Bureau, Census 2024 Gazetteer, 2020 place by county, CT county-to-cousub crosswalk, version 2024-gazetteer, pulled 2026-09-30, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_counties_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_cousubs_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_place_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_unsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_elsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_scsd_national.zip, https://www2.census.gov/geo/docs/reference/codes2020/national_place_by_county2020.txt, https://www2.census.gov/geo/docs/reference/ct_change/ct_cou_to_cousub_crosswalk.xlsx (used to match place names and codes; no table prints its values)
What this packet is and what the plan adds
This packet is the federal data for the plan's risk assessment, organized by the items of FEMA's Local Mitigation Plan Review Tool, Element B. Each section heading names the item its tables support; the plan and FEMA's review decide whether the item is met.
The plan adds what only the community has: local data on assets, critical facilities, development and each jurisdiction's impacts; local hazard history, including state-declared emergencies; the mitigation strategy; and adoption.
How the federal data are built: National Risk Index values are FEMA's model, not counts of events. Storm Events is more complete from 1996; zone-level records are placed by forecast zone, not by location in the county. Public Assistance for a jurisdiction is matched by applicant name. The Methods page gives every rule and the known edge cases.
OpenFEMA disclaimer
This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Reuse, citation and corrections
Reuse and citation: Hazard Plain text and tables are licensed under Creative Commons Attribution 4.0 International (CC BY 4.0, https://creativecommons.org/licenses/by/4.0/); credit Hazard Plain and the release. The underlying federal data are public domain; OpenFEMA data are also subject to the OpenFEMA terms and conditions.
Cite this: Hazard Plain (2026). Orange County, CA: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; County FIPS 06059). Automated baseline. https://hazardplain.org/ca/06059/ Built from FEMA OpenFEMA, the FEMA National Risk Index and NOAA NCEI Storm Events; source versions in the packet's Sources list.
Corrections: to report an error, name the packet, the table and what your records show. Contact: contact@hazardplain.org
Hazard Plain release 2026-10. As of 2026-09-30; Storm Events data through 2026-06-30. Automated baseline.