Hazard Plain Preview: automated baseline

Seminole County, FL

Risk-assessment baseline packet

Unit
County area 12117
Release
2026-10
As of
2026-09-28
Storm Events data through
2026-06-30

Hazard Plain is an independent product built from public federal data. It is not a FEMA document and is not reviewed or endorsed by FEMA or any state agency.

A starting point for the plan's risk assessment (FEMA Local Mitigation Plan Review Tool, Element B). It does not replace local data or FEMA review. Section headings say which FEMA review item each table supports; whether an item is satisfied is decided by the plan and its reviewers.

Hazard Plain release 2026-10, as of 2026-09-28. Independent product; not a FEMA document.

Plan clock

Status
Approved, expires 2030-06-13
Plan
Seminole County (FEMA plan 110867)
Approved
2025-06-13
Expires
2030-06-13
As of
2026-09-28
Days
1,354 days to expiry

What changed since your last plan (approved 2025-06-13)

New federal declarations
none (0 declaration rows; 0 counted incidents)
Storm Events records since approval
5 (data through 2026-06-30)
Repetitive loss now
FMA RL 23, SRL 16 (44 CFR 77.2); any definition: 131
Repeat-flood change
First release: no prior release to compare.

Sources

FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-26T121003Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)

FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-27T010817Z, pulled 2026-09-28, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

FEMA, OpenFEMA NfipMultipleLossProperties v1, version 2026-08-04T164045Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/NfipMultipleLossProperties (API)

Plan status for every jurisdiction listed in this county

JurisdictionTypeStatusPlanApprovedExpiresDays to expirynegative = days since expiryUpdate underwayNotes
Seminole County (unincorporated area)UnincorporatedApproved, expires 2030-06-13Seminole County (FEMA plan 110867)2025-06-132030-06-131,354
Altamonte Springs cityCityApproved, expires 2030-06-13Seminole County (FEMA plan 110867)2025-06-132030-06-131,354member approved 2025-08-21
Casselberry cityCityApproved, expires 2030-06-13Seminole County (FEMA plan 110867)2025-06-132030-06-131,354member approved 2025-08-21
Lake Mary cityCityApproved, expires 2030-06-13Seminole County (FEMA plan 110867)2025-06-132030-06-131,354member approved 2025-08-04
Longwood cityCityApproved, expires 2030-06-13Seminole County (FEMA plan 110867)2025-06-132030-06-131,354member approved 2025-08-21
Oviedo cityCityApproved, expires 2030-06-13Seminole County (FEMA plan 110867)2025-06-132030-06-131,354member approved 2025-08-04
Sanford cityCityApproved, expires 2030-06-13Seminole County (FEMA plan 110867)2025-06-132030-06-131,354member approved 2025-08-21
Winter Springs cityCityApproved, expires 2030-06-13Seminole County (FEMA plan 110867)2025-06-132030-06-131,354member approved 2025-08-04

Source

FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-26T121003Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)

State plan status and tribal plans in this state: see the state page.

Supports B1-a: hazards

Hazards NRI does not cover: check locally

  • 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)

Rank by EALHazardNRI risk ratingEAL ratingEAL buildingsmodeled dollars per yearEAL agriculturemodeled dollars per yearEAL population equivalencestatistical value of life and injury, $13.7M per life, not property damageEAL total (see note)modeled dollars per yearStorm Events records since 1996countEvidence for an omissionNRI Not Applicable, no declaration and no Storm Events record since 1996Storm Events coverage note
1Inland FloodingRelatively ModerateRelatively High$66,061,882$2,736$167,758$66,232,37616
2TornadoRelatively HighRelatively High$7,632,037$758$18,140,561$25,773,3579
3HurricaneRelatively HighRelatively High$23,406,347$230,046$936,574$24,572,96610Includes 2 Tropical Depression records, event types the NRI definition of this hazard leaves out.
4Strong WindRelatively HighRelatively High$2,889,600$506,045$1,138,037$4,533,682129Includes 2 High Wind records and 2 Strong Wind records, event types the NRI definition of this hazard leaves out.
5LightningRelatively HighRelatively High$155,227$2,412,075$2,567,30215
6WildfireRelatively ModerateRelatively Moderate$2,198,724$945$290,209$2,489,8781
7Heat WaveRelatively LowRelatively Moderate$104$14$1,682,366$1,682,4851
8EarthquakeRelatively LowRelatively Low$491,495$294,495$785,990Not in Storm Events. Storm Events coverage of this hazard is limited; absence is not evidence of low risk.
9Cold WaveRelatively LowRelatively Low$45,745$104,106$334,015$483,8666Includes 4 Frost/Freeze records, event types the NRI definition of this hazard leaves out.
10HailVery LowVery Low$30,913$11,050$53,821$95,784117
11DroughtVery LowVery Low$3,004$3,0040No recorded events in Storm Events since 1996 (data through 2026-06-30).
12LandslideVery LowVery Low$139$1$1400No recorded events in Storm Events since 1996 (data through 2026-06-30). Storm Events coverage of this hazard is limited; absence is not evidence of low risk.
13Coastal FloodingNo RatingNo Expected Annual Losses$0$0$00No recorded events in Storm Events since 1996 (data through 2026-06-30).
14Winter WeatherNo RatingNo Expected Annual Losses$0$0$0$01
AvalancheNot ApplicableNot Applicable0NRI rates avalanche Not Applicable for this county, and no federal declaration for this county names it.No recorded events in Storm Events since 1996 (data through 2026-06-30).
Ice StormNot ApplicableNot Applicable0NRI rates ice storm Not Applicable for this county, and no federal declaration for this county names it.No recorded events in Storm Events since 1996 (data through 2026-06-30).
TsunamiNot ApplicableNot Applicable0NRI rates tsunami Not Applicable for this county, and no federal declaration for this county names it.No recorded events in Storm Events since 1996 (data through 2026-06-30). Storm Events coverage of this hazard is limited; absence is not evidence of low risk.
Volcanic ActivityNot ApplicableNot Applicable0NRI rates volcanic activity Not Applicable for this county, and no federal declaration for this county names it.No recorded events in Storm Events since 1996 (data through 2026-06-30). Storm Events coverage of this hazard is limited; absence is not evidence of low risk.

Total = buildings + agriculture + population equivalence; FEMA values each expected death (or 10 injuries) at $13.7 million (2024 dollars).

Sources

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

Check your state hazard mitigation plan's hazard list for this county; explain any hazard you drop.

Supports B1-b: location

Where each hazard occurs

HazardLocationCensus tracts ratedrated of all tracts
AvalancheCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.0 of 89
Coastal FloodingThe 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.0 of 89
Cold WaveAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.89 of 89
DroughtAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.5 of 89
EarthquakeCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.89 of 89
HailAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.89 of 89
Heat WaveAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.89 of 89
HurricaneCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.89 of 89
Ice StormAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.0 of 89
Inland FloodingThe 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.89 of 89
LandslideCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.77 of 89
LightningAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.89 of 89
Strong WindAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.89 of 89
TornadoCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.89 of 89
TsunamiCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.0 of 89
Volcanic ActivityCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.0 of 89
WildfireCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.88 of 89
Winter WeatherAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.0 of 89

Source

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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)

Supports B1-c: extent

Extent: scale, observed range and worst recorded event per hazard

HazardScaleRecordscount, yearsObserved rangeWorst recorded eventMost damaging (when different)How it applies to membersNote
Avalanchenone (count and damage)0Physical measure: in event narratives only; local data required.
Coastal Flood, Storm Surge/Tidenone in data (FIRM for depth)0Flood depth: see the FEMA Flood Insurance Rate Map.
Cold/Wind Chill, Extreme Cold/Wind Chillwind chill2, 2003 to 2010 (2 zone-level)1 day; 2 with a recorded value1 consecutive day, 2010-12-14, zone-levelCold/Wind Chill, 2003-01-24, $0 property; $10,000 crops, reported for the zone (2003 dollars)Zone-level records: applies countywide; national data do not locate these events within the county.Wind chill: in event narratives only; local data required.
Frost/Freeze (outside NRI Cold Wave definition)crop damage4, 2009 to 2010 (4 zone-level)Frost/Freeze, 2010-12-27, $160,000 crop damage, reported for the zone (2010 dollars); NWS zone FLZ046 (SEMINOLE), zone-level: may include parts of neighboring countiesZone-level records: applies countywide; national data do not locate these events within the county.Temperature: in event narratives only; local data required.
DroughtUS Drought Monitor D-scale0Storm 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.
EarthquakeModified Mercalli (local data)0No Storm Events record; local data required (e.g., USGS).
Hailhail size (inches)135, 1971 to 20260.75 in to 3 in (median 1 in); 135 with a recorded value3 in hail, 2020-05-21Event records naming member places: Lake Mary city (14 records), Oviedo city (12 records), Longwood city (7 records), Sanford city (7 records), Altamonte Springs city (6 records), Winter Springs city (6 records), Casselberry city (2 records).
Excessive Heat, Heatheat index (narratives)1, 2022 to 2022 (1 zone-level)1 day; 1 with a recorded value1 consecutive day, 2022-06-24, zone-levelZone-level records: applies countywide; national data do not locate these events within the county.Heat index: in event narratives only; local data required.
Hurricane, Tropical Storm, Tropical DepressionSaffir-Simpson10, 1999 to 2024 (10 zone-level)Strongest recorded (records with damage, a wind speed or direct casualties first, then storm type, category and wind): Hurricane (Typhoon) record, 1999-09-14 to 1999-09-15, $400,000 property; crops not reported, reported for the zone (1999 dollars); NWS zone FLZ046 (SEMINOLE), zone-level: may include parts of neighboring countiesMost damaging recorded: Tropical Storm, 2017-09-10, $543,200,000 property; $0 crops, reported for the zone (2017 dollars)Zone-level records: applies countywide; national data do not locate these events within the county.Storm Events files every zone of a storm's episode under the storm's event type and category, so a Hurricane (Typhoon) record, especially an inland or remnant one, does not by itself mean hurricane-force winds here; read the damage and wind columns.
Ice StormSperry-Piltz (local data)0Ice thickness: in event narratives only; local data required.
Flash Flood, Flood, Lakeshore Flooddamage and flood days (FIRM for depth)16, 2001 to 2026 (1 zone-level)Flood, 2022-09-28, $241,000,000 property; $0 crops (2022 dollars)Event records naming member places: Sanford city (4 records), Winter Springs city (2 records), Altamonte Springs city (1 record), Casselberry city (1 record), Longwood city (1 record), Oviedo city (1 record). Zone-level records (1) apply countywide.Flood depth: see the FEMA Flood Insurance Rate Map. Storm Events damage can be $0 or blank even for a major flood, so the worst record here may not be the worst flood; compare FEMA Public Assistance by declaration in B1-d.
Debris Flownone (count and damage)0Physical measure: in event narratives only; local data required.
Lightningannualized frequency (the measure FEMA's Local Mitigation Planning Handbook names)15, 1997 to 2025Lightning, 2022-08-18, $0 property; $0 crops (2022 dollars), 1 direct death, 2 direct injuriesLightning, 2009-06-16, $700,000 property; $0 crops (2009 dollars)Event records naming member places: Lake Mary city (3 records), Winter Springs city (2 records), Altamonte Springs city (1 record), Longwood city (1 record), Oviedo city (1 record), Sanford city (1 record).Storm Events lists lightning with damage or casualties; physical measure in event narratives only; local data required.
High Wind and Strong Wind (outside NRI Strong Wind definition)wind speed (kt and mph)4, 2004 to 2021 (4 zone-level)43 kt (49 mph) to 80 kt (92 mph) (median 60.5 kt (70 mph)); 4 with a recorded value80 kt (92 mph) measured gust, High Wind, 2004-08-13; NWS zone FLZ046 (SEMINOLE), zone-level: may include parts of neighboring countiesZone-level records: applies countywide; national data do not locate these events within the county.
Thunderstorm Windwind speed (kt and mph)153, 1969 to 202535 kt (40 mph) to 70 kt (81 mph) (median 50 kt (58 mph)); 115 with a recorded value70 kt (81 mph) estimated gust, Thunderstorm Wind, 2005-04-07; same speed and measurement basis also recorded on 2005-04-07Thunderstorm Wind, 2011-03-30, $500,000 property; $0 crops (2011 dollars)Event records naming member places: Sanford city (17 records), Oviedo city (15 records), Longwood city (11 records), Altamonte Springs city (8 records), Casselberry city (8 records), Lake Mary city (5 records), Winter Springs city (5 records).
TornadoEnhanced Fujita (F before Feb 2007)31, 1966 to 2025F/EF0 to F/EF3 (median F/EF1); 29 with a recorded valueF3 tornado, 1998-02-23, 14 mi within this county, 200 yd wide, $30,000,000 property; crops not reported (1998 dollars), 12 direct deaths, 36 direct injuriesEvent records naming member places: Sanford city (2 records), Casselberry city (1 record), Lake Mary city (1 record), Longwood city (1 record), Oviedo city (1 record).From 1996 on, tornado records are per-county segments and length is the path length within this county (NWS Instruction 10-1605); records before 1996 may give the whole path length, including the path outside this county, and before 1996 a tornado is listed once, under the county where it began, with the whole path's rating; counties farther along the path may not list it. Length is not used to rank tornadoes.
Tsunaminone (count and damage)0Physical measure: in event narratives only; local data required.
Volcanic Ash, Volcanic AshfallVolcanic Explosivity Index (local data)0Physical measure: in event narratives only; local data required.
Wildfireacres burned (local data)1, 1998 to 1998Wildfire, 1998-07-01, $30,000,000 property; crops not reported (1998 dollars), 2 direct injuriesNo event record names a member place.Acres burned: in event narratives only; local data required.
Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleetnone in data (snowfall local)1, 2010 to 2010 (1 zone-level)No damage reported in 1 records.Zone-level records: applies countywide; national data do not locate these events within the county.Snow depth: in event narratives only; local data required.

Storm Events records are more complete after 1996; before 1996 only Tornado (from 1950), Hail and Thunderstorm Wind (from 1955) exist. Zone-level records are placed with NWS zone-county files, which exist from 2020 on; an earlier record is placed by its zone number in the nearest later file only when its zone name matches that file, records from zones NWS renumbered are placed by name or left out, and a record whose zone is in no known file is left out of every count, so counts before 2020 can be low. Some current zones are also missing from the NWS files, so recent counts can be low too.

Dollars are nominal (as reported), labeled with the year; not adjusted for inflation.

Sources

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, 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 2026-09-28, https://www.weather.gov/gis/ZoneCounty

Supports B1-d: previous occurrences

Declaration rows
39
Counted incidents
26

Federal disaster declarations for this county

DeclaredIncident beganFEMA numberTypeTitleMapped hazardCounty Public Assistancefederal share obligated, nominal dollarsFlagsNotes
2024-10-112024-10-05DR-4834-FLMajor disasterHURRICANE MILTONHurricane (primary); also designated: Inland Flooding$6,655,476.11during plan review, check whether your last plan included it; within last 5 years
2024-10-072024-10-05EM-3622-FLEmergencyHURRICANE MILTONHurricanenone foundduring plan review, check whether your last plan included it; within last 5 yearssame incident as DR-4834
2024-08-102024-08-01DR-4806-FLMajor disasterHURRICANE DEBBYHurricane$5,457.08during plan review, check whether your last plan included it; within last 5 years
2024-08-032024-08-01EM-3605-FLEmergencyTROPICAL STORM DEBBYHurricane (primary); also designated: Inland Flooding, Strong Wind, Tornadonone foundduring plan review, check whether your last plan included it; within last 5 yearssame incident as DR-4806
2023-08-312023-08-27DR-4734-FLMajor disasterHURRICANE IDALIAHurricane$58,526.23within last 5 years
2023-08-282023-08-27EM-3596-FLEmergencyTROPICAL STORM IDALIAHurricanenone foundwithin last 5 yearssame incident as DR-4734
2022-12-132022-11-07DR-4680-FLMajor disasterHURRICANE NICOLEHurricane$431,435.76within last 5 years
2022-11-082022-11-07EM-3587-FLEmergencyTROPICAL STORM NICOLEHurricanenone foundwithin last 5 yearssame incident as DR-4680
2022-09-292022-09-23DR-4673-FLMajor disasterHURRICANE IANHurricane$33,974,117.98within last 5 years
2022-09-242022-09-23EM-3584-FLEmergencyTROPICAL STORM IANHurricanenone foundwithin last 5 yearssame incident as DR-4673
2020-08-012020-07-31EM-3533-FLEmergencyHURRICANE ISAIASHurricanenone found
2020-03-252020-01-20DR-4486-FLMajor disasterCOVID-19 PANDEMICNon-natural, not counted$814,208,151.95
2020-03-132020-01-20EM-3432-FLEmergencyCOVID-19Non-natural, not countednone foundsame incident as DR-4486
2019-10-212019-08-28DR-4468-FLMajor disasterHURRICANE DORIANHurricane$1,567,243.19
2019-08-302019-08-28EM-3419-FLEmergencyHURRICANE DORIANHurricanenone foundsame incident as DR-4468
2017-09-102017-09-04DR-4337-FLMajor disasterHURRICANE IRMAHurricane$31,647,867.33
2017-09-052017-09-04EM-3385-FLEmergencyHURRICANE IRMAHurricanenone foundsame incident as DR-4337
2016-10-082016-10-03DR-4283-FLMajor disasterHURRICANE MATTHEWHurricane$3,165,894.22
2016-10-062016-10-03EM-3377-FLEmergencyHURRICANE MATTHEWHurricanenone foundsame incident as DR-4283
2008-08-242008-08-18DR-1785-FLMajor disasterTROPICAL STORM FAYHurricane; Inland Flooding$2,164,831.23
2008-08-212008-08-18EM-3288-FLEmergencyTROPICAL STORM FAYHurricane; Inland Floodingnone foundsame incident as DR-1785
2007-05-022007-05-01FM-2687-FLFire managementDELAND FIRE COMPLEXWildfirenone found
2007-02-032007-02-01DR-1679-FLMajor disasterSEVERE STORMS AND TORNADOESTornadonone found
2005-09-052005-08-29EM-3220-FLEmergencyHURRICANE KATRINA EVACUATIONHurricane: evacuation support, not a local hazard event; not countednone found
2004-09-262004-09-24DR-1561-FLMajor disasterHURRICANE JEANNEHurricane$3,214,173.35
2004-09-162004-09-13DR-1551-FLMajor disasterHURRICANE IVANHurricanenone placed in this county by FEMA's record; $368,533.58 for this declaration is not placed in any county (see the list below)
2004-09-042004-09-03DR-1545-FLMajor disasterHURRICANE FRANCESHurricane$5,357,576.74
2004-08-132004-08-11DR-1539-FLMajor disasterTROPICAL STORM BONNIE AND HURRICANE CHARLEYHurricane$58,293,332.06
2001-02-052000-12-01DR-1359-FLMajor disasterSEVERE FREEZECold WavePA not declared for this county
1999-10-201999-10-14DR-1306-FLMajor disasterFL-HURRICANE IRENE-DR-REQHurricanePA not declared for this county
1999-10-151999-10-14EM-3150-FLEmergencyTROPICAL STORM IRENE - FLORIDAHurricane$62,568.01same incident as DR-1306
1999-04-271999-04-15EM-3139-FLEmergencyFL-FIRES 04/15/99Wildfirenone found
1999-04-151999-04-13FM-2253-FLFire managementFL-FIRES 04/13/99Wildfirenone found
1998-06-181998-05-25DR-1223-FLMajor disasterEXTREME FIRE HAZARDWildfirenone found
1998-01-061997-12-25DR-1195-FLMajor disasterSEVERE STORMS, HIGH WINDS, TORNADOES, AND FLOODINGInland Flooding; Strong Wind; Tornadonone found
1990-01-151989-12-23DR-851-FLMajor disasterSEVERE FREEZECold WavePA not declared for this county
1985-03-181985-03-18DR-732-FLMajor disasterSEVERE FREEZECold WavePA not declared for this county
1984-03-291983-12-24DR-698-FLMajor disasterFREEZING TEMPERATURESCold WavePA not declared for this county
1977-01-311977-01-31DR-526-FLMajor disasterSEVERE WINTER WEATHERCold WavePA not declared for this county

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.

Dollars are nominal (as reported), labeled with the year; not adjusted for inflation.

Statewide declarations

DeclaredIncident beganFEMA numberTypeTitleMapped hazardFlagsNotes
1995-08-031995-08-02EM-3116-FLEmergencyHURRICANE ERINHurricane
1964-09-101964-09-10DR-176-FLMajor disasterHURRICANE DORAHurricane (primary); also designated: Inland Flooding
1964-09-081964-09-08DR-175-FLMajor disasterHURRICANE CLEOHurricane (primary); also designated: Inland Flooding
1962-12-171962-12-17DR-141-FLMajor disasterABNORMALLY HIGH TIDESInland Flooding
1960-09-121960-09-12DR-106-FLMajor disasterHURRICANE DONNAHurricane (primary); also designated: Inland Flooding
1960-03-231960-03-23DR-97-FLMajor disasterSEVERE WEATHER CONDITIONSOther, not an NRI hazard; not counted
1953-10-221953-10-22DR-12-FLMajor disasterFLOODInland Flooding

FEMA recorded these with designated area Statewide and no county. Listed on every county page in the state; not counted with county rows.

17 Fire Management declarations (1985-05-17 to 1998-06-28) FEMA filed as Statewide with no county; each names one local fire. Listed on the state page.

Source

FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-27T010817Z, pulled 2026-09-28, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)

Public Assistance not placed in a county in this state: 4 rows, $9,327,951.42

Disaster numberDeclaredApplicantCounty field in FEMA dataPA obligatedfederal share obligated, nominal dollarsWhy not placed
45642020-09-23PowerSouth Energy CooperativeCovington County$43,450.21county field is a county of another state and the applicant name does not identify a place in the declaring state
43992018-10-11PowerSouth Energy CooperativeCovington County$8,524,655.17county field is a county of another state and the applicant name does not identify a place in the declaring state
15952005-07-10Alabama Electric Cooperative, Inc.Covington County$391,312.46county field is a county of another state and the applicant name does not identify a place in the declaring state
15512004-09-16Alabama Electric Cooperative, Inc.Covington County$368,533.58county field is a county of another state and the applicant name does not identify a place in the declaring state

FEMA's Public Assistance summaries file these applicants under a county field that is not a county of this state (an Alaska school area, the former Valdez-Cordova Census Area, or another state's county), and the applicant name does not identify one place here. They are listed for the whole state and are not in any county total. Check whether any of them worked in your county.

Previous occurrences by hazard, with explicit no-event rows

HazardStorm Events recordsfull periodSince plan approvalrecordsDuring plan reviewrecordsLast 5 yearsrecordsDeclared incidentsdistinct incidentsDeclared since approvaldistinct incidentsPeriodStatement
Avalanche0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Coastal Flooding0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Cold Wave6000501996 to 2026-06-30Includes 4 Frost/Freeze records, event types the NRI definition of this hazard leaves out.
Drought0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Earthquake000000No Storm Events record; local data required (e.g., USGS).
Hail1352013001955 to 2026-06-30
Heat Wave1001001996 to 2026-06-30
Hurricane100251501996 to 2026-06-30Includes 2 Tropical Depression records, event types the NRI definition of this hazard leaves out.
Ice Storm0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Inland Flooding16126401996 to 2026-06-30
Landslide0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Lightning15023001996 to 2026-06-30
Strong Wind1572111201955 to 2026-06-30Includes 2 High Wind records and 2 Strong Wind records, event types the NRI definition of this hazard leaves out.
Tornado31022301950 to 2026-06-30
Tsunami0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Volcanic Activity0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Wildfire1000401996 to 2026-06-30
Winter Weather1000001996 to 2026-06-30

Sources

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-27T010817Z, pulled 2026-09-28, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)

NOAA National Weather Service, NWS county-public forecast zones correlation file, version bp03mr20 to bp16ap26 (11 files; newest bp16ap26), pulled 2026-09-28, https://www.weather.gov/gis/ZoneCounty

Notable Storm Events records

DateEvent typeMagnitude or extentDamagenominal dollarsDirect deaths, injuriesindirect not countedLocationFlagsWhy listed
2022-09-28Flood$241,000,000 property; $0 crops (2022 dollars)0, 0BEAR LAKE to CHULUOTAwithin last 5 yearsB1-c worst recorded: Flash Flood, Flood, Lakeshore Flood
2022-08-18Lightning$0 property; $0 crops (2022 dollars)1, 2WINTER SPGSwithin last 5 yearsdeaths or injuries recorded
2022-06-24Excessive Heat$0 property; $0 crops, reported for the zone (2022 dollars)0, 0NWS zone FLZ046 (SEMINOLE), zone-level: may include parts of neighboring countieswithin last 5 yearsB1-c worst recorded: Excessive Heat, Heat
2020-05-21Hail3 in$0 property; $0 crops (2020 dollars)0, 0NEW UPSALAB1-c worst recorded: Hail
2010-12-27Frost/Freeze$0 property; $160,000 crops, reported for the zone (2010 dollars)0, 0NWS zone FLZ046 (SEMINOLE), zone-level: may include parts of neighboring countiesB1-c worst recorded: Frost/Freeze (outside NRI Cold Wave definition)
2010-12-14Cold/Wind Chill$0 property; $0 crops, reported for the zone (2010 dollars)0, 0NWS zone FLZ046 (SEMINOLE), zone-level: may include parts of neighboring countiesB1-c worst recorded: Cold/Wind Chill, Extreme Cold/Wind Chill
2005-04-07Thunderstorm Wind70 kt (81 mph) estimated gust$150,000 property; $0 crops (2005 dollars)0, 0OVIEDOB1-c worst recorded: Thunderstorm Wind
2004-08-13High Wind80 kt (92 mph) measured gust$47,000,000 property; crops not reported, reported for the zone (2004 dollars)0, 0NWS zone FLZ046 (SEMINOLE), zone-level: may include parts of neighboring countiesB1-c worst recorded: High Wind and Strong Wind (outside NRI Strong Wind definition)
2003-09-25Lightning$0 property; $0 crops (2003 dollars)1, 2LAKE MARYdeaths or injuries recorded
1999-09-14Hurricane (Typhoon)$400,000 property; crops not reported, reported for the zone (1999 dollars)0, 0NWS zone FLZ046 (SEMINOLE), zone-level: may include parts of neighboring countiesB1-c worst recorded: Hurricane, Tropical Storm, Tropical Depression
1998-07-01Wildfire$30,000,000 property; crops not reported (1998 dollars)0, 2COUNTYWIDEB1-c worst recorded: Wildfire
1998-02-23TornadoF3, 14 mi within this county, 200 yd wide$30,000,000 property; crops not reported (1998 dollars)12, 36LONGWOOD to SANFORDdeaths or injuries recorded

The full list is in the XLSX file, sheet "B1-d Storm Events history" (373 rows).

Storm Events records are more complete after 1996; before 1996 only Tornado (from 1950), Hail and Thunderstorm Wind (from 1955) exist. Zone-level records are placed with NWS zone-county files, which exist from 2020 on; an earlier record is placed by its zone number in the nearest later file only when its zone name matches that file, records from zones NWS renumbered are placed by name or left out, and a record whose zone is in no known file is left out of every count, so counts before 2020 can be low. Some current zones are also missing from the NWS files, so recent counts can be low too.

Sources

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, 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 2026-09-28, https://www.weather.gov/gis/ZoneCounty

FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-26T121003Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)

State-declared emergencies are not in federal data. Add them from your state emergency management agency.

Tribal and special-area declarations in this state are listed on the state page.

Supports B1-e: probability

Probability: FEMA annualized frequency and descriptor per hazard

HazardFEMA annualized frequency (modeled)unit per rowUnitIn plain termsDescriptorDescriptor basisNRI events or days in its record period (hail, wind and tornado are area-weighted, so can be fractional)NRI periodLocationNote
Avalancheevents per year1994 to 2023 (30 years)see B1-fNot Applicable in NRI for this county; no descriptor.
Coastal Flooding0.01events per year at a location (modeled)about 0.01 per year at a given location in the countyStorm Events records in 0 of 30 years, 1996 to 2025 (0%)not shownmodeledsee B1-fNo Storm Events record of this hazard, 1996 to 2025; descriptor not assigned (the NRI value is the chance at a location in the county, not how often the hazard affects the county)
Cold Wave3.9event-days per yearabout 3.9 days per yearPossibleevent-days in 2 of 30 years, 1996 to 2025 (6.67%)74.72005-11-12 to 2024-11-12 (19 years)countywideNRI gives about 3.9 cold wave event-days a year here (its annualized frequency over 19 years; not its event count divided by the years), but Storm Events has a record in only 2 of 30 years. NRI counts from a different source that records far more events than Storm Events, so this descriptor reads much lower than NRI's frequency; read the two together. Frost/Freeze records are not counted in this descriptor: they record crop freezes, not cold waves.
Drought13.6event-days per yearabout 13.6 days per yearevent-days in 0 of 30 years, 1996 to 2025 (0%)5392000 to 2025 (25.25 years; D3 and D4 only)countywideNo recorded event-days, 1996 to 2025; descriptor not assigned
Earthquake0.000423annual probability at a locationchance a given location in the county has at least minor-damage shaking in a year: 0.0423%not shownmodeledsee B1-fDescriptor not assigned: the NRI value is the chance at a location in the county, not how often the hazard affects the county, and Storm Events does not record earthquakes.
Hail2.06events per yearabout 2.06 per yearHighly likelyFEMA annualized frequency (modeled)78.2 (modeled)1986 to 2023 (38 years)countywide
Heat Wave1.9event-days per yearabout 1.9 days per yearPossibleevent-days in 1 of 30 years, 1996 to 2025 (3.33%)27.22005-11-12 to 2024-11-12 (19 years)countywideNRI gives about 1.9 heat wave event-days a year here (its annualized frequency over 19 years; not its event count divided by the years), but Storm Events has a record in only 1 of 30 years. NRI counts from a different source that records far more events than Storm Events, so this descriptor reads much lower than NRI's frequency; read the two together.
Hurricane0.247events per yearabout 1 in 4 yearsLikelyFEMA annualized frequency (modeled)641851 to 2024 (Atlantic)see B1-fNRI counts hurricane and tropical storm tracks passing within storm-force wind range; federal declarations are counted separately in B1-d and need not match.
Ice Stormevent-days per year1946-12-31 to 2014-02-12 (67 years)countywideNot Applicable in NRI for this county; no descriptor.
Inland Flooding0.464event-days per yearabout 0.464 days per yearLikelyevent-days in 8 of 30 years, 1996 to 2025 (26.7%)131996 to 2023 (28 years)see B1-f
Landslide0.0346events per year (modeled)about 1 in 29 yearsPossibleFEMA annualized frequency (modeled)not shownmodeledsee B1-f
Lightning87.2days per year with a strikeabout 87.2 days per yearHighly likelyFEMA annualized frequency (modeled)not shown1995 to 2023 (29 years; CONUS)countywide
Strong Wind1.07events per yearabout 1.07 per yearHighly likelyFEMA annualized frequency (modeled)411986 to 2023 (38 years)countywide
Tornado0.226events per yearabout 1 in 4 yearsLikelyFEMA annualized frequency (modeled)not shown1950 to 2023 (EF2+); 1986 to 2023 (EF0-1)see B1-f
Tsunamiannual probability at the most exposed location (used in place of a county value)not shownmodeledsee B1-fNot Applicable in NRI for this county; no descriptor.
Volcanic Activityannual probabilitynot shownmodeledsee B1-fNot Applicable in NRI for this county; no descriptor.
Wildfire0.00805annual probability at a locationchance a given location in the county burns in a year: 0.805%PossibleStorm Events records in 1 of 30 years, 1996 to 2025 (3.33%)not shownmodeledsee B1-fDescriptor from Storm Events, not NRI: the NRI value is the chance at a location in the county, not how often the hazard affects the county.
Winter Weather0event-days per yearnone modeledPossibleevent-days in 1 of 30 years, 1996 to 2025 (3.33%)02005-11-12 to 2024-11-12 (19 years)countywideNRI models no winter weather event-days here (2005-11-12 to 2024-11-12, 19 years), but Storm Events has a record in 1 of 30 years. The descriptor comes from Storm Events, which records events NRI's definition leaves out, so the two use different thresholds; read them together.

FEMA annualized frequency (modeled) comes from the National Risk Index v1.20 (December 2025). It is not recorded events divided by years, and what it measures depends on the hazard. For most hazards it estimates how often the hazard affects this county each year: it counts events or event-days (drought, heat wave, cold wave, winter weather, ice storm and inland flooding are in days per year; lightning is the number of days per year with a recorded cloud-to-ground strike, from the NOAA Storm Prediction Center daily lightning climatology); it may count events in the surrounding area (hail, strong wind, tornado, hurricane and ice storm use a 49 km grid and buffers) and is averaged over the county's area; and some hazards use a minimum value for places with no recorded event. Earthquake, wildfire and coastal flooding are different: FEMA computes them for each census block and averages them over the county, so the value is the chance (for coastal flooding, the modeled number of floods per year) at a location in the county, which is lower than the chance that the hazard strikes somewhere in the county. Earthquake is the chance of at least minor-damage shaking (U.S. Geological Survey model); wildfire is the chance that a location burns in a large fire (U.S. Forest Service burn probability); coastal flooding comes from FEMA flood zones and NOAA high-tide flooding, so it can be above 1 where high-tide flooding is frequent. Tsunami is the value at the county's most exposed location, from recorded events and modeled return periods. For these four hazards the packet gives no "1 in N years" and takes the descriptor from Storm Events (none for earthquake) unless the value is 1 or more a year. Landslide is a U.S. Geological Survey modeled county rate spread by slope susceptibility. Volcanic activity is the chance that a volcano affecting the county erupts in a year. Drought counts only extreme and exceptional drought (D3 and D4). Source: FEMA, National Risk Index Technical Documentation v1.20, sections 5.2.2 (Table 5), 5.2.3, 7.4, 10.4, 16.5, 17.1, 17.3.1, 17.5, 20.3.1, 21.4, 22.4 and 6 to 23.

Sources

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

Descriptor scale used in this packet (defined per unit)

UnitDescriptorDefinition
events per yearHighly likely1 or more per year
events per yearLikelyabout once in 1 to 10 years
events per yearPossibleabout once in 10 to 100 years
events per yearUnlikelyless than once in 100 years
annual probabilityLikely10% to under 100% chance in a given year
annual probabilityPossible1% to under 10% chance in a given year
annual probabilityUnlikelyunder 1% chance in a given year
event-days (share of years)Highly likelyevent-days recorded in 90% or more of years
event-days (share of years)Likelyevent-days recorded in 10% to under 90% of years
event-days (share of years)Possibleevent-days recorded in some years but under 10% of years
lightning strike-daysHighly likelycloud-to-ground strikes on 1 or more days per year

Sources

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

Intensity bands: historical frequency (Storm Events)

HazardBandYearsEventscounty-coded recordsYears in periodEvents per yearevents / years
Hail1.00-1.99 in1996 to 202567302.23
Hail2.00 in+1996 to 202511300.367
Strong Wind (Thunderstorm Wind records)50-64 kt1996 to 202598303.27
Strong Wind (Thunderstorm Wind records)65 kt+1996 to 20256300.2
Strong Wind (Thunderstorm Wind records)unmeasured or below 50 kt1996 to 202521300.7
TornadoEF0-11996 to 20257300.233
TornadoEF2-31996 to 20252300.0667
TornadoEF4-51996 to 20250300
Tornadounrated (EFU)1996 to 20250300

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.

Source

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

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.

Supports B1-f: variation across the planning area

Range of census tract risk within the county

HazardTractsrated of allRisk score minNRI score, 0 to 100MedianMaxTracts by ratingNote
Avalanche0 of 89Not Applicable 89
Coastal Flooding0 of 89No Rating 89
Cold Wave89 of 8916.719.755.5Relatively Moderate 1, Relatively Low 55, Very Low 33National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.
Drought5 of 8971.975.081.3Relatively Low 1, Very Low 4, No Rating 84National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. Agriculture is all of NRI's expected annual loss for this hazard in the county, so the tract range above mostly reflects where crop and livestock value is, not where buildings and people are. Confirm locally.
Earthquake89 of 896.322.647.1Relatively Low 2, Very Low 87
Hail89 of 894.919.750.5Relatively Low 1, Very Low 88National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.
Heat Wave89 of 894.923.349.2Relatively Low 60, Very Low 29National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.
Hurricane89 of 8967.984.094.2Relatively High 5, Relatively Moderate 77, Relatively Low 7
Ice Storm0 of 89Not Applicable 89National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.
Inland Flooding89 of 894.149.095.2Relatively High 13, Relatively Moderate 34, Relatively Low 32, Very Low 10
Landslide77 of 899.930.270.2Very Low 77, No Rating 12
Lightning89 of 8933.175.093.4Relatively High 38, Relatively Moderate 45, Relatively Low 6National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.
Strong Wind89 of 8932.272.799.1Very High 1, Relatively High 16, Relatively Moderate 63, Relatively Low 9National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.
Tornado89 of 8949.879.897.6Very High 5, Relatively High 53, Relatively Moderate 28, Relatively Low 3
Tsunami0 of 89Not Applicable 89
Volcanic Activity0 of 89Not Applicable 89
Wildfire88 of 8924.680.697.6Relatively High 2, Relatively Moderate 15, Relatively Low 52, Very Low 19, No Rating 1
Winter Weather0 of 89No Rating 89National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.

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.

Source

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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)

Per-member block (Starter, confirm locally)

MemberTypePlan statusRepetitive lossFMA RL and SRL (44 CFR 77.2); repeat-flood, any definitionPublic Assistance matchedfederal share obligated, nominal dollarsEvent records naming this placeall years; since the member's planNotes
Seminole County (unincorporated area)UnincorporatedApproved, expires 2030-06-13FMA RL 14, SRL 13; any 80$77,248,055.780; 0Includes $4,467,790.36 for declarations not counted as hazard incidents (DR-4486-FL).
Altamonte Springs cityCityApproved, expires 2030-06-13FMA RL 7, SRL 1; any 26$7,405,522.2916; 0
Casselberry cityCityApproved, expires 2030-06-13FMA RL 0, SRL 0; any 0$4,709,716.6712; 0Includes $12,037.46 for declarations not counted as hazard incidents (DR-4486-FL).
Lake Mary cityCityApproved, expires 2030-06-13FMA RL 0, SRL 0; any 0$3,080,118.4423; 0
Longwood cityCityApproved, expires 2030-06-13FMA RL 0, SRL 0; any 0$4,167,203.9921; 1
Oviedo cityCityApproved, expires 2030-06-13FMA RL 0, SRL 0; any 2$8,628,860.7430; 0
Sanford cityCityApproved, expires 2030-06-13FMA RL 0, SRL 1; any 12$19,503,574.6431; 0Includes $25,293.32 for declarations not counted as hazard incidents (DR-4486-FL).
Winter Springs cityCityApproved, expires 2030-06-13FMA RL 2, SRL 1; any 10$11,646,039.0115; 0

Member 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 member row, while the county table counts only its part in this county.

School districts and special districts get a plan clock row only.

Sources

FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-26T121003Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)

FEMA, OpenFEMA NfipMultipleLossProperties v1, version 2026-08-04T164045Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/NfipMultipleLossProperties (API)

FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-26T151157Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries (API)

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

Supports B2-a and B2-b: assets and impacts

Local data required

County-level starter. The plan must describe impacts for each participant and its own assets.

  • Critical facilities and lifelines per hazard
  • A problem statement per participant 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

HazardBuilding exposuremodeled dollarsAgriculture exposuremodeled dollarsPopulation exposedpeopleEAL buildingsmodeled dollars per yearEAL agriculturemodeled dollars per yearEAL population equivalencestatistical value of life and injury, $13.7M per life, not property damageEAL as % of exposurebuildings; agriculture where notedStorm Events damage since 2025-06-13county-coded records, property plus crops, nominal dollarsZone-level damage since planproperty plus crops, reported for the zonePublic Assistance since plannominal dollars; see noteNote
AvalancheNot Applicable in NRI for this county
Coastal Flooding$628,446,1133,617$0$00%
Cold Wave$81,429,508,221$27,484,658470,586$45,745$104,106$334,015under 0.0001%
Drought$22,904,968$3,0040.0131% (agriculture)NRI has no building exposure for this hazard; agriculture shown
Earthquake$137,482,901,808470,856$491,495$294,4950.000357%
Hail$81,429,508,221$27,484,658470,586$30,913$11,050$53,821under 0.0001%$0
Heat Wave$81,429,508,221$27,484,658470,586$104$14$1,682,366under 0.0001%
Hurricane$81,426,921,332$27,484,658470,562$23,406,347$230,046$936,5740.0287%
Ice StormNot Applicable in NRI for this county
Inland Flooding$81,371,482,549$1,845,63419,749$66,061,882$2,736$167,758n/a (see note)$0NRI 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. EAL as % of exposure: n/a.
Landslide$73,755,330392$139$10.000189%
Lightning$81,429,508,221470,586$155,227$2,412,0750.000191%
Strong Wind$81,429,508,221$27,484,658470,586$2,889,600$506,045$1,138,0370.00355%$0
Tornado$81,429,508,221$27,484,658470,586$7,632,037$758$18,140,5610.00937%
TsunamiNot Applicable in NRI for this county
Volcanic ActivityNot Applicable in NRI for this county
Wildfire$5,770,258,367$16,711,36456,289$2,198,724$945$290,2090.0381%
Winter Weather$0$00$0$0$0building exposure is 0 in NRI

Totals since 2025-06-13 (Storm Events through 2026-06-30): 5 county-coded records, 5 with a damage value recorded (including $0), $0; 0 zone-level records, 0 with a damage value recorded (including $0), $0 reported for the zone; Public Assistance on counted declarations none found (0 declarations, 0 with PA).

Total = buildings + agriculture + population equivalence; FEMA values each expected death (or 10 injuries) at $13.7 million (2024 dollars).

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 must not be added up; the unit total counts each declaration once.

Dollars are nominal (as reported), labeled with the year; not adjusted for inflation.

Sources

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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 2026-09-28, 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 2026-09-28, https://www.weather.gov/gis/ZoneCounty

FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-27T010817Z, pulled 2026-09-28, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)

FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-26T151157Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries (API)

FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-26T121003Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)

Supports B2-a: context

County context

MeasureValue
Population470,586
Building value (total, not at risk)$81,429,508,221
Agriculture value (total, not at risk)$27,484,658
NRI risk rating (all hazards)Relatively Moderate
Expected annual loss, buildings and agriculture, all hazards$103,770,917
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)$25,449,913
Social vulnerability ratingVery Low
Community resilience ratingRelatively Moderate
NRI versionDecember 2025

FEMA's all-hazard expected annual loss total adds buildings, agriculture and population equivalence; the two parts are shown separately so the property figure is not read as including the statistical value of life.

Source

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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)

Supports B2-c: repetitive loss

Repetitive loss in this county, both definitions

DefinitionPropertiesSevere repetitive lossProperties
Repetitive loss, FMA definition (44 CFR 77.2)23Severe repetitive loss, FMA definition (44 CFR 77.2)16
Repetitive loss, NFIP insurance definition128Severe repetitive loss, NFIP insurance definition10

Your state NFIP coordinator's list may use the NFIP insurance definition, so its counts can be higher.

Repeat-flood properties: county and state-level rows

ScopeRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
County total231612810131278
SEMINOLE COUNTY*141377880149
ALTAMONTE SPRINGS, CITY OF7126126016
OVIEDO, CITY OF0020202
SANFORD, CITY OF011211217
WINTER SPRINGS, CITY OF211001004
Unknown (community ID Unknown in FEMA data)0010100
State level, not in this county: county not reported01901001

Repeat-flood properties by plan member (NFIP community)

MemberNFIP community IDRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredpropertiesNote
Seminole County (unincorporated area)120289141377880149
Altamonte Springs city1202907126126016
Casselberry city1202910000000
Lake Mary city1204160000000
Longwood city1202920000000
Oviedo city1202930020202
Sanford city120294011211217
Winter Springs city120295211001004

Per-member types: XLSX sheet 'B2-c Members'.

Member 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 member row, while the county table counts only its part in this county.

County repeat-flood properties by occupancy group

Occupancy groupRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
single-family residential23131148117277
2 to 4 unit residential0000000
other residential0000000
non-residential031421401
not reported0000000

Institutional properties cannot be separated in this data: FEMA's occupancy groups have no institutional class, so they fall 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; OpenFEMA's fmaRl field description omits the Increased Cost of Compliance clause of 44 CFR 77.2(i). NFIP repetitive loss (FEMA insurance definition, nfipRl) is 2 or more claims over $1,000 in 10 years and can drop to false when a property is mitigated. Also shown: NFIP severe repetitive loss, any category, mitigated and currently insured.

Your state NFIP coordinator's list may use the NFIP insurance definition, so its counts can be higher.

Counts are aggregates of FEMA's public NFIP Multiple Loss Properties file (as of 2026-08-02). No property is identified. County assignment is FEMA's geocode.

Counts may differ from your state NFIP coordinator's list, which is the source the Handbook names.

In this county 2 properties are FMA repetitive loss but not NFIP repetitive loss, and 107 properties are NFIP repetitive loss but not FMA repetitive loss.

Exact counts; no count suppression.

Sources

Every table above lists its own sources. The full list, for the plan's bibliography (FEMA review item A4-a):

  1. FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-26T121003Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)
  2. FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-27T010817Z, pulled 2026-09-28, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)
  3. FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-26T151157Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries (API)
  4. FEMA, OpenFEMA NfipMultipleLossProperties v1, version 2026-08-04T164045Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/NfipMultipleLossProperties (API)
  5. FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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)
  6. NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/
  7. NOAA National Weather Service, NWS county-public forecast zones correlation file, version bp03mr20 to bp16ap26 (11 files; newest bp16ap26), pulled 2026-09-28, https://www.weather.gov/gis/ZoneCounty
  8. U.S. Census Bureau, Census 2024 Gazetteer, 2020 place by county, CT county-to-cousub crosswalk, version 2024-gazetteer, pulled 2026-09-28, 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

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).

Hazard Plain is an independent product built from public federal data. It is not a FEMA document and is not reviewed or endorsed by FEMA or any state agency.

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). Seminole County, FL: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-28; County area 12117). Preview: automated baseline. 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: to be added

Hazard Plain release 2026-10. As of 2026-09-28; Storm Events data through 2026-06-30. File hazard-plain_2026-10_FL_12117. Preview: automated baseline.