Summary
Plan status as of 2026-09-30: Approved, expires 2031-09-17. Plan: San Juan 2026 (FEMA plan 112061), approved 2026-09-18.
Since the plan was approved on 2026-09-18: no new hazard declaration; details under "What changed since your last plan".
Highest expected annual loss (FEMA National Risk Index, modeled total; see B1-a): Hurricane ($193,328,387 a year), Earthquake ($132,083,868) and Tsunami ($65,354,421).
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 2031-09-17
- Plan:
- San Juan 2026 (FEMA plan 112061)
- Approved:
- 2026-09-18
- Days to expiry:
- 1,813
What changed since your last plan (approved 2026-09-18)
- New federal declarations:
- none
- Storm Events records since approval:
- not yet covered: Storm Events data run through 2026-06-30, before the approval date, so there is no period to count yet
- Repetitive loss now:
- FMA RL 0, SRL 0 (44 CFR 77.2); any definition: 0
- 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
Source: 1
| Jurisdiction | Type | Status | Plan | Approved | Expires | Days to expirynegative = days since expiry |
|---|---|---|---|---|---|---|
| San Juan Municipio | County | Approved, expires 2031-09-17 | San Juan 2026 (FEMA plan 112061) | 2026-09-18 | 2031-09-17 | 1,813 |
State plan status and tribal plans in this state: see the state page.
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, 10
| 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 | Hurricane | Insufficient Data | Very High | $184,486,172 | $0 | $8,842,216 | $193,328,387 | 38 | Includes 5 Flash Flood, 12 Flood, 4 Heavy Rain, 1 Strong Wind and 4 Thunderstorm Wind records whose NOAA event or episode narrative names a tropical cyclone (NOAA's type kept; each also counts under that type's hazard, except Heavy Rain, which is no NRI hazard). |
| 2 | Earthquake | Insufficient Data | Relatively High | $65,974,516 | n/a | $66,109,351 | $132,083,868 | Storm Events does not record earthquakes. | |
| 3 | Tsunami | Insufficient Data | Very High | $705,724 | n/a | $64,648,697 | $65,354,421 | 0 | No recorded events in Storm Events since 1996 (data through 2026-06-30). |
| 4 | Inland Flooding | Insufficient Data | Relatively Moderate | $34,088,280 | $0 | $120,984 | $34,209,264 | 525 | |
| 5 | Landslide | Insufficient Data | Relatively High | $4,941,002 | n/a | $7,960 | $4,948,963 | 31 | |
| 6 | Lightning | Insufficient Data | Very High | $130,608 | n/a | $3,252,271 | $3,382,879 | 6 | |
| 7 | Coastal Flooding | Insufficient Data | Relatively Moderate | $637,076 | n/a | $276,237 | $913,313 | 12 | |
| 8 | Tornado | Insufficient Data | Very Low | $152,257 | $0 | $122,076 | $274,333 | 1 | |
| 9 | Strong Wind | Insufficient Data | Very Low | $1,526 | $0 | $9,376 | $10,902 | 38 | Includes 1 High Wind and 8 Strong Wind records (NOAA non-thunderstorm wind types, outside NRI's Strong Wind definition). |
| 10 | Volcanic Activity | Insufficient Data | Relatively Low | $27 | n/a | $8,186 | $8,213 | 5 | |
| 11 | Hail | Insufficient Data | Very Low | $898 | $0 | $4,805 | $5,703 | 1 | |
| 12 | Cold Wave | Insufficient Data | No Expected Annual Losses | $0 | $0 | $0 | $0 | 1 | |
| 12 | Drought | Insufficient Data | No Expected Annual Losses | n/a | $0 | n/a | $0 | 1 | |
| 12 | Heat Wave | Insufficient Data | No Expected Annual Losses | $0 | $0 | $0 | $0 | 27 | |
| 12 | Winter Weather | Insufficient Data | No Expected Annual Losses | $0 | $0 | $0 | $0 | 0 | No recorded events in Storm Events since 1996 (data through 2026-06-30). |
| Wildfire | Insufficient Data | Insufficient Data | n/a | n/a | n/a | n/a | 0 | No recorded events in Storm Events since 1996 (data through 2026-06-30). |
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.
Hazards with the same expected annual loss share a rank.
Local data needed: state and local tsunami, winter weather and wildfire records (Storm Events records these hazards only in part).
Not applicable to this county per NRI, with no federal declaration and no Storm Events record since 1996: avalanche and ice storm. 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 |
|---|---|
| Earthquake | no tract has a National Risk Index rating for this hazard |
| Hurricane | no tract has a National Risk Index rating for this hazard |
| Landslide | no tract has a National Risk Index rating for this hazard |
| Tornado | no tract has a National Risk Index rating for this hazard |
| Tsunami | no tract has a National Risk Index rating for this hazard |
| Volcanic Activity | no tract has a National Risk Index rating for this hazard |
| Wildfire | no tract has a National Risk Index rating for this hazard |
Up to 3 census tracts per hazard, highest National Risk Index rating first, then highest score; a tract number is the Census tract number. 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, 11
| Hazard | Scale | Recordscount and years | Observed range | Worst recorded event | Most damaging (when different) | How it applies to jurisdictions | Note |
|---|---|---|---|---|---|---|---|
| Coastal Flood, Storm Surge/Tide | none in data (flood depth: FIRM) | 12 records, 1998 to 2025 (11 zone-level) | Coastal Flood, 1999-02-01, $15,000 property; crops not reported (1999 dollars); Storm Events area SAN JUAN (legacy zone code PRZ127) | No event record names a jurisdiction in the plan. Zone-level records (11) apply countywide. | Flood depth: see the FEMA Flood Insurance Rate Map. | ||
| Cold/Wind Chill, Extreme Cold/Wind Chill | wind chill | 1 record, 2000 (1 zone-level) | 5 days; 1 with a recorded value | 5 consecutive days, 2000-01-16 to 2000-01-20, zone-level | Countywide (zone-level records). | ||
| Frost/Freeze (outside NRI's Cold Wave definition) | crop damage | 0 | |||||
| Drought | U.S. Drought Monitor scale (D0 to D4) | 1 record, 2000 (1 zone-level) | 31 days; 1 with a recorded value | 31 days (1 month), 2000-03-01 to 2000-03-31, 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) | 1 record, 2000 | 0.75 in; 1 with a recorded value | 0.75 in hail, 2000-02-23 | No event record names a jurisdiction in the plan. | ||
| Excessive Heat, Heat | heat index (in event narratives) | 27 records, 2023 to 2024 (27 zone-level) | 1 day to 30 days (median 2 days); 17 with a recorded value | September 2023 (1 monthly summary record), zone-level | Countywide (zone-level records). | ||
| Hurricane, Tropical Storm, Tropical Depression | Saffir-Simpson | 12 records, 1998 to 2024 (12 zone-level) | Strongest recorded: Hurricane record (NOAA event type 'Hurricane (Typhoon)'), 1998-09-21 to 1998-09-22, $243,000,000 property; $43,000,000 crops (1998 dollars); Storm Events area SAN JUAN (legacy zone code PRZ127) | 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. | ||
| Wind, rain, flood or surge records whose NOAA event or episode narrative names a tropical cyclone | damage | 26 records, 1998 to 2025 (7 zone-level) | Flash Flood, 1998-08-28, $50,000 property; crops not reported (1998 dollars) (NOAA type Flash Flood; narrative names Hurricane Danielle) | No event record names a jurisdiction in the plan. Zone-level records (7) apply countywide. | NOAA filed these records under the type shown, and each also counts under that type's hazard; the record's event or episode narrative names the storm, checked against NOAA's HURDAT2 storm list by name and dates. Some records name the storm only as context (for example a distant storm that fed moisture), so read the narrative before attributing a record to the storm. | ||
| Flash Flood, Flood, Lakeshore Flood | damage and flood days (flood depth: FIRM) | 525 records, 1997 to 2026 (83 zone-level) | Flash Flood, 2001-11-07, $9,000,000 property; $1,000,000 crops (2001 dollars); NWS zone PRZ001 (covers 8 county areas) | No event record names a jurisdiction in the plan. Zone-level records (83) apply countywide. | 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) | 31 records, 2003 to 2026 (26 zone-level) | Debris Flow, 2007-12-12, $20,000 property; $0 crops (2007 dollars), 1 direct injury (reported for the zone); NWS zone PRZ001 (covers 8 county areas) | No event record names a jurisdiction in the plan. Zone-level records (26) apply countywide. | |||
| Lightning | annualized frequency (the measure FEMA's Local Mitigation Planning Handbook names) | 6 records, 2001 to 2025 (3 zone-level) | Lightning, 2003-10-15, $300,000 property; crops not reported (2003 dollars); NWS zone PRZ001 (covers 8 county areas) | No event record names a jurisdiction in the plan. Zone-level records (3) apply countywide. | Storm Events lists lightning with damage or casualties. | ||
| High Wind and Strong Wind (outside NRI's Strong Wind definition) | wind speed (kt and mph) | 9 records, 1998 to 2025 (9 zone-level) | 25 kt (29 mph) to 50 kt (58 mph) (median 40 kt (46 mph)); 7 with a recorded value | 50 kt (58 mph) estimated gust, Strong Wind, 2005-04-22; same speed and measurement basis also recorded the same day; NWS zone PRZ001 (covers 8 county areas) | Strong Wind, 2024-08-14, $15,000 property; $0 crops (zone total, 2024 dollars; the zone covers 8 county areas) | Countywide (zone-level records). | |
| Thunderstorm Wind | wind speed (kt and mph) | 30 records, 1995 to 2025 (7 zone-level) | 26 kt (30 mph) to 42 kt (48 mph) (median 35 kt (40 mph)); 18 with a recorded value | 42 kt (48 mph) measured gust, Thunderstorm Wind, 2015-06-22 | Thunderstorm Wind, 2024-02-06, $105,000 property; $0 crops (2024 dollars) | No event record names a jurisdiction in the plan. Zone-level records (7) apply countywide. | |
| Tornado | Enhanced Fujita (Fujita before Feb 2007) | 2 records, 1995 to 2000 | F/EF0; 2 with a recorded value | F0 tornado, 2000-02-23, 0.2 mi within this county, 10 yd wide, damage not reported; same rating, casualties and property damage also recorded on 1995-05-01 | No event record names a jurisdiction in the plan. | 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) | 0 | |||||
| Volcanic Ash, Volcanic Ashfall | Volcanic Explosivity Index (local data) | 5 records, 2001 to 2008 (5 zone-level) | Volcanic Ash, 2001-07-29, $300,000 property; crops not reported (2001 dollars); NWS zone PRZ001 (covers 8 county areas) | Countywide (zone-level records). | |||
| Wildfire | acres burned (local data) | 0 | |||||
| Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleet | none in data (snowfall: local data) | 0 |
In event narratives only (local data needed): wind chill, temperature, heat index, acres burned and snow depth; any physical measure of debris flow, lightning, tsunami and volcanic ash, volcanic ashfall.
Storm Events records are more complete after 1996; before 1996 only Tornado (from 1950), Hail and Thunderstorm Wind (from 1955) exist. Zone-level records from zones that 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.
A monthly summary record covers most or all of a month; it does not count days at wave conditions.
Supports FEMA checklist item B1-d: previous occurrences
Federal declarations for this county: 24 declarations covering 17 separate hazard incidents counted in this packet (declarations for the same incident count once; non-natural and evacuation-only declarations are not counted).
Storm Events records since the plan: not yet covered: Storm Events data run through 2026-06-30, before the approval date, so there is no period to count yet.
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 |
|---|---|---|---|---|---|---|---|---|
| 2024-08-13 | 2024-08-13 | EM-3610-PR | Emergency | Tropical Storm Ernesto | Hurricane; Inland Flooding; Landslide | no Public Assistance recorded | within last 5 years | |
| 2022-09-21 | 2022-09-17 | DR-4671-PR | Major disaster | Hurricane Fiona | Hurricane | $14,309,968.89 | within last 5 years | |
| 2022-09-18 | 2022-09-17 | EM-3583-PR | Emergency | Tropical Storm Fiona | Hurricane | no Public Assistance recorded | within last 5 years | same incident as DR-4671 |
| 2020-08-22 | 2020-08-21 | EM-3537-PR | Emergency | Tropical Storm Laura | Hurricane | no Public Assistance recorded | ||
| 2020-07-29 | 2020-07-27 | EM-3532-PR | Emergency | Potential Tropical Cyclone Nine | Hurricane | no Public Assistance recorded | ||
| 2020-03-27 | 2020-01-20 | DR-4493-PR | Major disaster | COVID-19 Pandemic | Non-natural, not counted | $3,765,181.54 | ||
| 2020-03-13 | 2020-01-20 | EM-3452-PR | Emergency | COVID-19 | Non-natural, not counted | no Public Assistance recorded | same incident as DR-4493 | |
| 2020-01-07 | 2019-12-28 | EM-3426-PR | Emergency | Earthquakes | Earthquake | no Public Assistance recorded | ||
| 2019-08-27 | 2019-08-26 | EM-3417-PR | Emergency | Tropical Storm Dorian | Hurricane | no Public Assistance recorded | ||
| 2017-09-20 | 2017-09-17 | DR-4339-PR | Major disaster | Hurricane Maria | Hurricane | $783,793,536.57 | ||
| 2017-09-18 | 2017-09-17 | EM-3391-PR | Emergency | Hurricane Maria | Hurricane | no Public Assistance recorded | same incident as DR-4339 | |
| 2017-09-10 | 2017-09-05 | DR-4336-PR | Major disaster | Hurricane Irma | Hurricane | $2,952,395.13 | ||
| 2011-08-27 | 2011-08-21 | DR-4017-PR | Major disaster | Hurricane Irene | Hurricane | $319,057.84 | ||
| 2011-08-22 | 2011-08-21 | EM-3326-PR | Emergency | Hurricane Irene | Hurricane | no Public Assistance recorded | same incident as DR-4017 | |
| 2009-10-24 | 2009-10-23 | EM-3306-PR | Emergency | Explosions and Fire | Non-natural, not counted | $82,187.19 | ||
| 2004-09-17 | 2004-09-14 | DR-1552-PR | Major disaster | Tropical Storm Jeanne and Resulting Landslides and Mudslides | Hurricane; Landslide | $771,637.10 | ||
| 1999-11-17 | 1999-11-17 | EM-3151-PR | Emergency | Hurricane Lenny | Hurricane | no Public Assistance recorded | ||
| 1998-09-24 | 1998-09-20 | DR-1247-PR | Major disaster | Hurricane Georges - 18 Sep 98 | Hurricane | no Public Assistance recorded | ||
| 1996-11-21 | 1996-11-21 | EM-3124-PR | Emergency | Gas Leak Explosion | Non-natural, not counted | not available: FEMA's Public Assistance data start in 1998 (declarations from 1998-08-26 on) | ||
| 1996-09-11 | 1996-09-09 | DR-1136-PR | Major disaster | Hurricane Hortense | Hurricane | not available: FEMA's Public Assistance data start in 1998 (declarations from 1998-08-26 on) | ||
| 1989-09-21 | 1989-09-17 | DR-842-PR | Major disaster | Hurricane Hugo | Hurricane | not available: FEMA's Public Assistance data start in 1998 (declarations from 1998-08-26 on) | ||
| 1979-09-02 | 1979-09-02 | DR-597-PR | Major disaster | Hurricane David | Hurricane | not available: FEMA's Public Assistance data start in 1998 (declarations from 1998-08-26 on) | ||
| 1975-09-19 | 1975-09-19 | DR-483-PR | Major disaster | Tropical Storm Elioise | Inland Flooding (primary); also designated: Hurricane | not available: FEMA's Public Assistance data start in 1998 (declarations from 1998-08-26 on) | ||
| 1970-10-12 | 1970-10-12 | DR-296-PR | Major disaster | Heavy Rains & Flooding | Inland Flooding | not available: FEMA's Public Assistance data start in 1998 (declarations from 1998-08-26 on) |
Mapped hazard: "X (primary); also designated: Y" means FEMA's incident type maps to X and its designated incident codes or title add Y; a list separated by semicolons, such as "Inland Flooding; Tornado", has no primary hazard, because the incident type (Severe Storm or Coastal Storm) maps to no single hazard.
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 |
|---|---|---|---|---|---|
| 1998-09-21 | 1998-09-20 | EM-3130-PR | Emergency | Hurricane Georges (Direct Federal Assist First 72 Hrs) | Hurricane |
| 1964-05-26 | 1964-05-26 | DR-170-PR | Major disaster | Extreme Drought Conditions | Drought |
| 1956-08-18 | 1956-08-18 | DR-62-PR | Major disaster | Hurricane | Hurricane (primary); also designated: Inland Flooding |
FEMA recorded these with designated area Statewide and no county, so they are listed on every county page in the state (where FEMA also gives the declaration a row for the county, it is shown once, in the county table) and not counted with county rows. Local data needed: whether each one affected this county.
Public Assistance filed under this county for declarations that do not list it: 5 rows, $2,243,945.22
Sources: 2, 3
| FEMA number | Declared | Title | Applicant | PA obligatedfederal share obligated, nominal dollars |
|---|---|---|---|---|
| DR-4473-PR | 2020-01-16 | Earthquakes | Religiosas del Sagrado Corazon | $44,678.03 |
| DR-4473-PR | 2020-01-16 | Earthquakes | Inter American University of PR | $422,107.02 |
| DR-4473-PR | 2020-01-16 | Earthquakes | Iglesia Metodista de Puerto Rico | $524,952.77 |
| DR-4473-PR | 2020-01-16 | Earthquakes | Asociacion Frailes Capuchinos, Inc. | $1,252,207.40 |
| EM-3384-PR | 2017-09-05 | Hurricane Irma | San Juan (Municipio) | $0.00 |
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 |
|---|---|---|---|---|---|---|---|---|
| Coastal Flooding | 12 | 0 | 6 | 0 | 0 | 1996 to 2026-06-30 | ||
| Cold Wave | 1 | 0 | 0 | 0 | 0 | 1996 to 2026-06-30 | ||
| Drought | 1 | 0 | 0 | 0 | 0 | 1996 to 2026-06-30 | ||
| Earthquake | 0 | 0 | 0 | 1 | 0 | Storm Events does not record earthquakes; the USGS earthquake catalog is the source. | ||
| Hail | 1 | 0 | 0 | 0 | 0 | 1955 to 2026-06-30 | ||
| Heat Wave | 27 | 0 | 27 | 0 | 0 | 1996 to 2026-06-30 | ||
| Hurricane | 38 | 1 | 16 | 15 | 0 | 1996 to 2026-06-30 | Includes 5 Flash Flood, 12 Flood, 4 Heavy Rain, 1 Strong Wind and 4 Thunderstorm Wind records whose NOAA event or episode narrative names a tropical cyclone (NOAA's type kept; each also counts under that type's hazard, except Heavy Rain, which is no NRI hazard). | |
| Inland Flooding | 525 | 21 | 188 | 3 | 0 | 1996 to 2026-06-30 | ||
| Landslide | 31 | 1 | 5 | 2 | 0 | 1996 to 2026-06-30 | ||
| Lightning | 6 | 0 | 3 | 0 | 0 | 1996 to 2026-06-30 | ||
| Strong Wind | 39 | 1 | 15 | 0 | 0 | 1955 to 2026-06-30 | Includes 1 High Wind and 8 Strong Wind records. | |
| Tornado | 2 | 0 | 0 | 0 | 0 | 1950 to 2026-06-30 | ||
| Tsunami | 0 | 0 | 0 | 0 | 0 | 1996 to 2026-06-30 | No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events | |
| Volcanic Activity | 5 | 0 | 0 | 0 | 0 | 1996 to 2026-06-30 | ||
| Wildfire | 0 | 0 | 0 | 0 | 0 | 1996 to 2026-06-30 | No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events | |
| Winter Weather | 0 | 0 | 0 | 0 | 0 | 1996 to 2026-06-30 | No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events |
Notable Storm Events records
Sources: 1, 6, 7
| Date | Event type | Magnitude or extent | Damagenominal dollars | Deaths, injuriesdirect only | Location | Flags | Why listed |
|---|---|---|---|---|---|---|---|
| 2025-04-28 | Flash Flood | $25,000 property; $0 crops (2025 dollars) | 1, 0 | 5.68 miles SSW of SAN JUAN to 5.33 miles SSW of SAN JUAN | within last 5 years | deaths or injuries recorded | |
| 2024-08-14 | Strong Wind; narrative names Ernesto | 40 kt (46 mph) estimated gust | $15,000 property; $0 crops (zone total, 2024 dollars) | 0, 0 | NWS zone PRZ001 (SAN JUAN AND VICINITY), zone-level | within last 5 years | B1-c most damaging: High Wind and Strong Wind |
| 2024-02-06 | Thunderstorm Wind | 35 kt (40 mph) estimated gust | $105,000 property; $0 crops (2024 dollars) | 0, 0 | 2 miles NW of SAN JUAN | within last 5 years | B1-c most damaging: Thunderstorm Wind |
| 2023-08-01 | Flash Flood | $3,500 property; $0 crops (2023 dollars) | 0, 2 | 3.76 miles NW of SAN JUAN to 3.54 miles NW of SAN JUAN | within last 5 years | deaths or injuries recorded | |
| 2023-04-04 | Coastal Flood | $0 property; $0 crops (zone total, 2023 dollars) | 1, 0 | NWS zone PRZ001 (SAN JUAN AND VICINITY), zone-level | within last 5 years | deaths or injuries recorded | |
| 2015-06-22 | Thunderstorm Wind | 42 kt (48 mph) measured gust | $100 property; $0 crops (2015 dollars) | 0, 0 | 4.73 miles NE of SAN JUAN to 4.64 miles NE of SAN JUAN | B1-c worst recorded: Thunderstorm Wind | |
| 2007-12-12 | Debris Flow | $20,000 property; $0 crops (zone total, 2007 dollars) | 0, 1 | NWS zone PRZ001 (SAN JUAN AND VICINITY), zone-level | B1-c worst recorded: Debris Flow | ||
| 2005-04-22 | Strong Wind | 50 kt (58 mph) estimated gust | $1,000 property; crops not reported (zone total, 2005 dollars) | 0, 0 | NWS zone PRZ001 (SAN JUAN AND VICINITY), zone-level | B1-c worst recorded: High Wind and Strong Wind | |
| 2003-10-15 | Lightning | $300,000 property; crops not reported (zone total, 2003 dollars) | 0, 0 | NWS zone PRZ001 (SAN JUAN AND VICINITY), zone-level | B1-c worst recorded: Lightning | ||
| 2001-11-07 | Flash Flood | $9,000,000 property; $1,000,000 crops (zone total, 2001 dollars) | 0, 0 | NWS zone PRZ001 (SAN JUAN AND VICINITY), zone-level | B1-c worst recorded: Flash Flood, Flood, Lakeshore Flood | ||
| 2000-02-23 | Tornado | F0, 0.2 mi within this county, 10 yd wide | damage not reported | 0, 0 | CAGUAS | B1-c worst recorded: Tornado | |
| 1999-02-01 | Coastal Flood | $15,000 property; crops not reported (zone total, 1999 dollars) | 0, 0 | Storm Events area SAN JUAN (legacy zone code PRZ127), zone-level | B1-c worst recorded: Coastal Flood, Storm Surge/Tide | ||
| 1998-09-21 | Hurricane (NOAA event type 'Hurricane (Typhoon)') | $243,000,000 property; $43,000,000 crops (zone total, 1998 dollars) | 0, 0 | Storm Events area SAN JUAN (legacy zone code PRZ127), zone-level | B1-c worst recorded: Hurricane, Tropical Storm, Tropical Depression | ||
| 1998-08-28 | Flash Flood; narrative names Hurricane Danielle | $50,000 property; crops not reported (1998 dollars) | 0, 0 | NORTH PORTION | B1-c worst recorded: Wind, rain, flood or surge records whose NOAA event or episode narrative names a tropical cyclone |
The full list is in the Excel file, sheet "B1-d Storm Events history" (688 rows).
Location is the place NOAA recorded, as written in its data; it need not be a jurisdiction in this plan.
Also counted as Hurricane: the record's event or episode narrative names the storm. Some records name the storm only as context (for example a distant storm that fed moisture), so read the narrative before attributing a record to the storm.
Local data needed: state-declared emergencies, from your state emergency management agency (federal data do not include them).
FEMA's declaration data list no tribal or special-area declarations for this state.
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 |
|---|---|---|---|---|---|---|---|---|---|
| Coastal Flooding | 0.212 | events per year at a location (modeled) | about 0.21 per year at a given location in the county | Likely | Storm Events records in 10 of 30 years, 1996 to 2025 (33.3%) | not shown | modeled | see B1-f | |
| Cold Wave | 0 | event-days per year | none modeled | Possible | Storm Events event-days in 1 of 30 years, 1996 to 2025 (3.33%) | 0 | 2005-11-12 to 2024-11-12 (19 years) | countywide | NRI models no cold wave event-days here (2005-11-12 to 2024-11-12, 19 years); Storm Events has a record in 1 of 30 years. The descriptor comes from Storm Events, which records events NRI's definition leaves out. |
| Drought | 1.68 | event-days per year | about 1.68 days per year | Possible | Storm Events event-days in 1 of 30 years, 1996 to 2025 (3.33%) | 84 | 2000 to 2025 (25.25 years; D3 and D4 only) | countywide | |
| Earthquake | 0.0431 | annual probability at a location | chance a given location in the county has at least minor-damage shaking in a year: 4.31% | Possible | FEMA annualized frequency (modeled), at a location in the county | not shown | modeled | see B1-f | Storm Events does not record earthquakes. |
| Hail | 0.0266 | events per year | about 1 in 38 years | Possible | FEMA annualized frequency (modeled) | 1.1 (modeled) | 1986 to 2023 (38 years) | countywide | |
| Heat Wave | 0.102 | event-days per year | about 0.102 days per year | Possible | Storm Events event-days in 2 of 30 years, 1996 to 2025 (6.67%) | 1.27 | 2005-11-12 to 2024-11-12 (19 years) | countywide | |
| Hurricane | 0.173 | events per year | about 1 in 6 years | Likely | FEMA annualized frequency (modeled) | 42 | 1851 to 2024 (Atlantic) | see B1-f | NRI counts hurricane and tropical storm tracks passing within storm-force wind range; federal declarations are in B1-d. |
| Inland Flooding | 5.64 | event-days per year | about 5.64 days per year | Highly likely | Storm Events event-days in 29 of 30 years, 1996 to 2025 (96.7%) | 158 | 1996 to 2023 (28 years) | see B1-f | |
| Landslide | 0.77 | events per year (modeled) | about 0.77 per year | Likely | FEMA annualized frequency (modeled) | not shown | modeled | see B1-f | |
| Lightning | 56.1 | days per year with a strike | about 56.1 days per year | Highly likely | FEMA annualized frequency (modeled) | not shown | 1995 to 2023 (29 years; CONUS) | countywide | |
| Strong Wind | 0.00498 | events per year | about 1 in 201 years | Unlikely | FEMA annualized frequency (modeled) | 1 | 1986 to 2023 (38 years) | countywide | |
| Tornado | 0.00324 | events per year | about 1 in 309 years | Unlikely | FEMA annualized frequency (modeled) | not shown | 1950 to 2023 (EF2+); 1986 to 2023 (EF0-1) | see B1-f | |
| Tsunami | 0.0557 | 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: 5.57% | Possible | FEMA annualized frequency (modeled), at the county's most exposed location | not shown | modeled | see B1-f | No Storm Events record, 1996 to 2025. |
| Volcanic Activity | 0.0101 | annual probability | about 1 in 99 years | Possible | FEMA annualized frequency (modeled) | not shown | modeled | see B1-f | |
| Wildfire | annual probability at a location | Storm Events records in 0 of 30 years, 1996 to 2025 (0%) | not shown | modeled | see B1-f | No descriptor: no Storm Events record 1996 to 2025 | |||
| Winter Weather | 0 | event-days per year | none modeled | Storm Events 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 winter weather record, 1996 to 2025 |
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; otherwise (always for earthquake) the scale is applied to the chance at a location, and the county as a whole is at least as likely. 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 | 0 | 30 | 0 |
| Hail | 2.00 in+ | 1996 to 2025 | 0 | 30 | 0 |
| Thunderstorm Wind (counted as NRI Strong Wind) | 50-64 kt | 1996 to 2025 | 0 | 30 | 0 |
| Thunderstorm Wind (counted as NRI Strong Wind) | 65 kt+ | 1996 to 2025 | 0 | 30 | 0 |
| Thunderstorm Wind (counted as NRI Strong Wind) | unmeasured or below 50 kt | 1996 to 2025 | 22 | 30 | 0.733 |
| Tornado | EF0-1 | 1996 to 2025 | 1 | 30 | 0.0333 |
| 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 | |||
| Coastal Flooding | 0 of 137 | Insufficient Data 137 | |||
| Cold Wave | 0 of 137 | Insufficient Data 137 | |||
| Drought | 0 of 137 | Insufficient Data 137 | |||
| Earthquake | 0 of 137 | Insufficient Data 137 | |||
| Hail | 0 of 137 | Insufficient Data 137 | |||
| Heat Wave | 0 of 137 | Insufficient Data 137 | |||
| Hurricane | 0 of 137 | Insufficient Data 137 | |||
| Inland Flooding | 0 of 137 | Insufficient Data 137 | |||
| Landslide | 0 of 137 | Insufficient Data 137 | |||
| Lightning | 0 of 137 | Insufficient Data 137 | |||
| Strong Wind | 0 of 137 | Insufficient Data 137 | |||
| Tornado | 0 of 137 | Insufficient Data 137 | |||
| Tsunami | 0 of 137 | Not Applicable 108, Insufficient Data 29 | |||
| Volcanic Activity | 0 of 137 | Insufficient Data 137 | |||
| Wildfire | 0 of 137 | Insufficient Data 137 | |||
| Winter Weather | 0 of 137 | Insufficient Data 137 | |||
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.
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 |
|---|---|---|---|---|---|---|
| San Juan Municipio | County | Approved, expires 2031-09-17 | FMA RL 0, SRL 0; any 0 | $204,896,039.71 | 0 total; Storm Events data end 2026-06-30, before this plan's approval | Puerto Rico commonwealth community (720000): this row counts only its properties in this municipio, as the county table does. Includes $1,640,009.37 for declarations not counted as hazard incidents (DR-4493-PR, EM-3306-PR). |
Repetitive-loss counts are for whole NFIP communities, which can extend beyond this county (see the note in B2-c).
County Public Assistance in B1-d also includes applicants filed under the county that are not matched to a jurisdiction row here (for example county offices and boards filed under their own names, such as a sheriff's office or a conservation board, and state agencies, special districts and nonprofits), so the jurisdiction rows add up to less.
FEMA files applicants under varying names, so these rows may not include every payment to a jurisdiction. The county totals in B1-d count every applicant FEMA files under this county, whatever the name.
NRI v1.20 rates no hazard in any census tract of this county (every tract reads Insufficient Data or Not Applicable), so the hazards-by-jurisdiction table is not built.
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 2026-09-18county-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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Coastal Flooding | $13,621,026,414 | n/a | 59,059 | $637,076 | n/a | $276,237 | 0.00468% | ||||
| Cold Wave | $0 | $0 | 0 | $0 | $0 | $0 | building exposure is 0 in NRI | ||||
| Drought | n/a | $0 | n/a | n/a | $0 | n/a | agriculture exposure is 0 in NRI | ||||
| Earthquake | $133,122,491,642 | n/a | 342,259 | $65,974,516 | n/a | $66,109,351 | 0.0496% | ||||
| Hail | $74,294,584,455 | $0 | 341,981 | $898 | $0 | $4,805 | under 0.0001% | ||||
| Heat Wave | $72,530,064,915 | $0 | 336,157 | $0 | $0 | $0 | 0% | ||||
| Hurricane | $74,292,207,452 | $0 | 341,964 | $184,486,172 | $0 | $8,842,216 | 0.248% | ||||
| Inland Flooding | $74,044,142,987 | $0 | 45,261 | $34,088,280 | $0 | $120,984 | n/a (see note) | 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 | $2,527,527,809 | n/a | 16,861 | $4,941,002 | n/a | $7,960 | 0.195% | ||||
| Lightning | $74,294,584,455 | n/a | 341,981 | $130,608 | n/a | $3,252,271 | 0.000176% | ||||
| Strong Wind | $74,294,584,455 | $0 | 341,981 | $1,526 | $0 | $9,376 | under 0.0001% | ||||
| Tornado | $74,294,584,455 | $0 | 341,981 | $152,257 | $0 | $122,076 | 0.000205% | ||||
| Tsunami | $10,912,297,261 | n/a | 18,813 | $705,724 | n/a | $64,648,697 | 0.00647% | ||||
| Volcanic Activity | $74,294,584,455 | n/a | 341,981 | $27 | n/a | $8,186 | under 0.0001% | ||||
| Wildfire | n/a | n/a | n/a | n/a | n/a | n/a | NRI publishes no building exposure for this county | ||||
| Winter Weather | $0 | $0 | 0 | $0 | $0 | $0 | building exposure is 0 in NRI |
Totals since 2026-09-18: Storm Events not yet covered: Storm Events data run through 2026-06-30, before the approval date, so there is no period to count yet; Public Assistance: no counted declaration since the plan.
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 | 341,981 |
| Building value (total, not at risk) | $74,294,584,455 |
| Agriculture value (total, not at risk) | $0 |
| NRI risk rating (all hazards) | Insufficient Data |
| Expected annual loss, buildings and agriculture, all hazards | $291,118,087 |
| 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) | $143,402,160 |
| Social vulnerability rating | Data Unavailable |
| Community resilience rating | Data Unavailable |
| 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) | 0 | Severe repetitive loss, FMA definition (44 CFR 77.2) | 0 |
| Repetitive loss, NFIP insurance definition | 0 | Severe repetitive loss, NFIP insurance definition | 0 |
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 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Statewide, no county in FEMA's file | 54 | 165 | 1,572 | 158 | 1,574 | 0 | 38 |
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 | Note |
|---|---|---|---|---|---|---|---|---|---|
| San Juan Municipio | 720000 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | Puerto Rico commonwealth community (720000): this row counts only its properties in this municipio, as the county table does. |
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: 0 in every occupancy group.
Sources: 1, 4
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 0 properties are FMA repetitive loss but not NFIP repetitive loss, and 0 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)
- U.S. Census Bureau, Census 2020 Block Assignment Files (county subdivision and place), version baf2020, pulled 2026-10-02, https://www2.census.gov/geo/docs/maps-data/data/baf2020/, https://www2.census.gov/programs-surveys/decennial/2020/data/01-Redistricting_File--PL_94-171/
- U.S. Census Bureau, Census county adjacency file, 2024 vintage, version 2024, pulled 2026-10-03, https://www2.census.gov/geo/docs/reference/county_adjacency/county_adjacency2024.txt
- NOAA National Hurricane Center, NHC HURDAT2 best-track data (Atlantic 1851 to 2025; Northeast and North Central Pacific 1949 to 2025), version 2025-092326, pulled 2026-10-03, https://www.nhc.noaa.gov/data/hurdat/hurdat2-1851-2025-092326.txt, https://www.nhc.noaa.gov/data/hurdat/hurdat2-nepac-1949-2025-092926.txt
What this packet is and what the plan adds
This packet is the federal data for the plan's risk assessment (the summary on page 1 says how it is organized); the plan and FEMA's review decide whether each 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). San Juan Municipio, PR: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; County FIPS 72127). Automated baseline. https://hazardplain.org/pr/72127/ 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