Hazard Plain Preview: automated baseline

Decatur County, IA

Risk-assessment baseline packet

Unit
County area 19053
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 2028-02-13
Plan
Decatur County (FEMA plan 108540)
Approved
2023-02-14
Expires
2028-02-13
As of
2026-09-28
Days
503 days to expiry

What changed since your last plan (approved 2023-02-14)

New federal declarations
none (0 declaration rows; 0 counted incidents)
Storm Events records since approval
31 (data through 2026-06-30)
Repetitive loss now
FMA RL 0, SRL 0 (44 CFR 77.2); any definition: 1
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: 18 rows, in the section "Plan clock: Plan status for every jurisdiction listed in this county" after these cover pages.

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

Plan clock

Plan status for every jurisdiction listed in this county

JurisdictionTypeStatusPlanApprovedExpiresDays to expirynegative = days since expiryUpdate underwayNotes
Decatur CountyCountyApproved, expires 2028-02-13Decatur County (FEMA plan 108540)2023-02-142028-02-13503
Davis City cityCityApproved, expires 2028-02-13Decatur County (FEMA plan 108540)2023-02-142028-02-13503member approved 2023-03-15
Decatur City cityCityApproved, expires 2028-02-13Decatur County (FEMA plan 108540)2023-02-142028-02-13503member approved 2023-02-23
Garden Grove cityCityApproved, expires 2028-02-13Decatur County (FEMA plan 108540)2023-02-142028-02-13503member approved 2023-03-17
Grand River cityCityApproved, expires 2028-02-13Decatur County (FEMA plan 108540)2023-02-142028-02-13503member approved 2023-03-15
Lamoni cityCityApproved, expires 2028-02-13Decatur County (FEMA plan 108540)2023-02-142028-02-13503member approved 2023-02-23
Le Roy cityCityPlan 108540 approved 2023-02-14, pending adoption here; not yet eligibleDecatur County (FEMA plan 108540), pending adoption here2023-02-14 by FEMA; not yet adopted here2028-02-13 once adoptedFEMA tracker shows a plan approvable pending adoptionNot yet eligible: adopt the approved plan.
Leon cityCityApproved, expires 2028-02-13Decatur County (FEMA plan 108540)2023-02-142028-02-13503member approved 2023-03-27
Pleasanton cityCityPlan 108540 approved 2023-02-14, pending adoption here; not yet eligibleDecatur County (FEMA plan 108540), pending adoption here2023-02-14 by FEMA; not yet adopted here2028-02-13 once adoptedFEMA tracker shows a plan approvable pending adoptionNot yet eligible: adopt the approved plan.
Van Wert cityCityApproved, expires 2028-02-13Decatur County (FEMA plan 108540)2023-02-142028-02-13503member approved 2023-03-27
Weldon cityCityApproved, expires 2028-02-13Decatur County (FEMA plan 108540)2023-02-142028-02-13503member approved 2023-03-27
Central Decatur Community School DistrictSchool/School DistrictApproved, expires 2028-02-13Decatur County (FEMA plan 108540)2023-02-142028-02-13503member approved 2023-02-23
Lamoni Community School DistrictSchool/School DistrictApproved, expires 2028-02-13Decatur County (FEMA plan 108540)2023-02-142028-02-13503member approved 2023-02-23
Mormon Trail Community School DistrictSchool/School DistrictApproved, expires 2027-07-19Wayne County (FEMA plan 108338)2022-07-192027-07-19294member approved 2023-02-02
Mount Ayr Community School DistrictSchool/School DistrictExpired on 2024-02-27Ringgold (FEMA plan 105609)2019-02-272024-02-27-944
Wayne Community School DistrictSchool/School DistrictApproved, expires 2027-07-19Wayne County (FEMA plan 108338)2022-07-192027-07-19294member approved 2023-02-02
Decatur County HospitalHospital/Medical FacilityPlan 108540 approved 2023-02-14, pending adoption here; not yet eligibleDecatur County (FEMA plan 108540), pending adoption here2023-02-14 by FEMA; not yet adopted here2028-02-13 once adoptedFEMA tracker shows a plan approvable pending adoptionNot yet eligible: adopt the approved plan.
Graceland UniversityCollege/UniversityPlan 108540 approved 2023-02-14, pending adoption here; not yet eligibleDecatur County (FEMA plan 108540), pending adoption here2023-02-14 by FEMA; not yet adopted here2028-02-13 once adoptedFEMA tracker shows a plan approvable pending adoptionNot yet eligible: adopt the approved plan.

Source

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

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
1DroughtRelatively HighRelatively High$2,256,276$2,256,27630
2Inland FloodingVery LowVery Low$1,522,666$315,994$3,732$1,842,39263
3TornadoRelatively LowRelatively Low$522,737$3,397$601,110$1,127,2435
4Cold WaveRelatively LowRelatively Moderate$2,477$281,775$828,860$1,113,11220Includes 7 Frost/Freeze records, event types the NRI definition of this hazard leaves out.
5Heat WaveRelatively LowRelatively Low$7,098$3$652,766$659,8674
6Strong WindRelatively LowRelatively Low$187,811$25,522$199,362$412,695110Includes 20 High Wind records, event types the NRI definition of this hazard leaves out.
7HailRelatively LowRelatively Low$91,837$120,671$16,976$229,48480
8LightningVery LowVery Low$6,519$48,929$55,4486
9WildfireVery LowVery Low$44,110$697$5,868$50,6750No 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.
10EarthquakeVery LowVery Low$17,007$7,095$24,103Not in Storm Events. Storm Events coverage of this hazard is limited; absence is not evidence of low risk.
11Ice StormVery LowVery Low$19,164$586$19,75015
12Winter WeatherVery LowRelatively Low$12,676$148$267$13,09156
13LandslideRelatively LowVery Low$209$7,044$7,2530No 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.
14HurricaneVery LowVery Low$438$881under $1$1,3190No recorded events in Storm Events since 1996 (data through 2026-06-30).
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).
Coastal FloodingNot ApplicableNot Applicable0NRI rates coastal flooding 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 3
Coastal FloodingCensus 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 3
Cold WaveAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.3 of 3
DroughtAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.3 of 3
EarthquakeCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.3 of 3
HailAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.3 of 3
Heat WaveAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.3 of 3
HurricaneCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.3 of 3
Ice StormAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.3 of 3
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.3 of 3
LandslideCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.3 of 3
LightningAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.3 of 3
Strong WindAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.3 of 3
TornadoCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.3 of 3
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 3
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 3
WildfireCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.3 of 3
Winter WeatherAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.3 of 3

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 chill13, 1996 to 2024 (13 zone-level)2 days to 4 days (median 2 days); 10 with a recorded value4 consecutive days, 2024-01-13 to 2024-01-16, zone-levelCold/Wind Chill, 1999-09-21, property not reported; $294,117.65 crops, reported for the zone (1999 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. Cold/Wind Chill records from May to September (a frost night, not a cold wave) are counted but not used for the longest run.
Frost/Freeze (outside NRI Cold Wave definition)crop damage7, 1997 to 2019 (7 zone-level)Frost/Freeze, 2009-10-10, $2,500,000 crop damage, reported for the zone (2009 dollars); NWS zone IAZ094 (DECATUR), 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-scale30, 1999 to 2024 (30 zone-level)11 days to 134 days (median 50 days); 11 with a recorded value134 days (about 4.4 months), 2023-09-12 to 2024-01-23, a run of 5 consecutive Storm Events drought records, zone-levelDrought, 2012-07-01, $0 property; $45,000,000 crops, reported for the zone (2012 dollars)Zone-level records: applies countywide; national data do not locate these events within the county.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.
EarthquakeModified Mercalli (local data)0No Storm Events record; local data required (e.g., USGS).
Hailhail size (inches)95, 1956 to 20250.75 in to 2.75 in (median 1 in); 95 with a recorded value2.75 in hail, 2005-06-04Hail, 2019-06-25, $0 property; $200,000 crops (2019 dollars)Event records naming member places: Leon city (22 records), Lamoni city (15 records), Decatur City city (11 records), Van Wert city (9 records), Grand River city (7 records), Davis City city (5 records), Garden Grove city (5 records), Le Roy city (2 records), Pleasanton city (2 records).
Excessive Heat, Heatheat index (narratives)4, 2001 to 2019 (4 zone-level)1 day to 14 days (median 3.5 days); 4 with a recorded value14 consecutive days, 2011-07-15 to 2011-07-28, 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-Simpson0Storm 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)15, 1996 to 2017 (15 zone-level)Ice Storm, 2007-12-10, $150,000 property; $0 crops, reported for the zone (2007 dollars); NWS zone IAZ094 (DECATUR), zone-level: may include parts of neighboring countiesZone-level records: applies countywide; national data do not locate these events within the county.Ice thickness: in event narratives only; local data required.
Flash Flood, Flood, Lakeshore Flooddamage and flood days (FIRM for depth)63, 1996 to 2025 (19 zone-level)Flood, 2010-06-12, $0 property; $20,000,000 crops (2010 dollars)Event records naming member places: Pleasanton city (19 records), Grand River city (18 records), Davis City city (10 records), Lamoni city (5 records), Garden Grove city (3 records), Leon city (3 records), Van Wert city (2 records), Le Roy city (1 record). Zone-level records (19) 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)6, 1996 to 2010Lightning, 2001-04-08, $50,000 property; crops not reported (2001 dollars)Event records naming member places: Leon city (4 records), Garden Grove city (2 records).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)20, 1996 to 2025 (20 zone-level)35 kt (40 mph) to 72 kt (83 mph) (median 52.5 kt (60 mph)); 18 with a recorded value72 kt (83 mph) measured gust, High Wind, 2021-12-15; NWS zone IAZ094 (DECATUR), zone-level: may include parts of neighboring countiesHigh Wind, 1998-11-10, $300,000 property; $5,100 crops, reported for the zone (1998 dollars)Zone-level records: applies countywide; national data do not locate these events within the county.
Thunderstorm Windwind speed (kt and mph)110, 1956 to 202550 kt (58 mph) to 71 kt (82 mph) (median 54 kt (62 mph)); 102 with a recorded value71 kt (82 mph) estimated, Thunderstorm Wind, 2001-04-08, 2 direct injuriesThunderstorm Wind, 2011-06-19, $200,000 property; $0 crops (2011 dollars)Event records naming member places: Leon city (21 records), Lamoni city (15 records), Garden Grove city (8 records), Van Wert city (8 records), Decatur City city (7 records), Davis City city (5 records), Grand River city (4 records), Le Roy city (1 record).
TornadoEnhanced Fujita (F before Feb 2007)19, 1957 to 2022F/EF0 to F/EF4 (median F/EF1); 17 with a recorded valueF4 tornado, 1989-05-24, 9 mi path length (records before 1996 may include the whole path; rating and listing come from the county where the tornado began), 300 yd wide, $25,000,000 property; crops not recorded (1989 dollars); same rating, casualties and property damage also recorded on 1984-06-07Event records naming member places: Grand River city (2 records), Le Roy city (2 records), Garden Grove city (1 record), Lamoni city (1 record), Leon city (1 record), Weldon 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)0Acres burned: in event narratives only; local data required.
Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleetnone in data (snowfall local)56, 1996 to 2025 (56 zone-level)Heavy Snow, 1997-10-26, $640,000 property; $2,600,000 crops, reported for the zone (1997 dollars); NWS zone IAZ094 (DECATUR), zone-level: may include parts of neighboring countiesZone-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
14
Counted incidents
11

Federal disaster declarations for this county

DeclaredIncident beganFEMA numberTypeTitleMapped hazardCounty Public Assistancefederal share obligated, nominal dollarsFlagsNotes
2020-03-232020-01-20DR-4483-IAMajor disasterCOVID-19 PANDEMICNon-natural, not counted$61,259.34
2020-03-132020-01-20EM-3480-IAEmergencyCOVID-19Non-natural, not countednone foundsame incident as DR-4483
2019-03-232019-03-12DR-4421-IAMajor disasterSEVERE STORMS AND FLOODINGInland Flooding$9,346.34
2014-07-142014-06-03DR-4181-IAMajor disasterSEVERE STORMS, TORNADOES, STRAIGHT-LINE WINDS, AND FLOODINGInland Flooding; Strong Wind; Tornado$437,944.51
2013-05-312013-04-17DR-4119-IAMajor disasterSEVERE STORMS, STRAIGHT-LINE WINDS, AND FLOODINGInland Flooding (primary); also designated: Strong Wind$237,736.53
2010-07-292010-06-01DR-1930-IAMajor disasterSEVERE STORMS, FLOODING, AND TORNADOESInland Flooding; Tornado$222,688.03
2008-05-272008-05-25DR-1763-IAMajor disasterSEVERE STORMS, TORNADOES, AND FLOODINGInland Flooding; Tornado$1,016,432.67
2008-01-042007-12-10DR-1737-IAMajor disasterSEVERE WINTER STORMIce Storm$410,376.49
2007-05-252007-05-05DR-1705-IAMajor disasterSEVERE STORMS, FLOODING, AND TORNADOESInland Flooding; Tornado$133,519.84
2005-09-102005-08-29EM-3239-IAEmergencyHURRICANE KATRINA EVACUATIONHurricane: evacuation support, not a local hazard event; not countednone found
1998-07-021998-06-13DR-1230-IAMajor disasterSEVERE STORMS, TORNADOES AND FLOODINGInland Flooding (primary); also designated: TornadoPA not declared for this county
1993-07-091993-04-13DR-996-IAMajor disasterSEVERE STORMS & FLOODINGInland Floodingnone found
1992-10-021992-09-14DR-965-IAMajor disasterSEVERE STORMS & FLOODINGInland Floodingnone found
1969-08-141969-08-14DR-269-IAMajor disasterHEAVY RAINS & FLOODINGInland Floodingnone found

School districts and special districts in this county: $116,677.24 (included in the county total above). Public Assistance matched by applicant name to the school districts and special districts FEMA lists as plan members in this county. They are not shown as member blocks, so their total is listed here. These dollars are already included in the county PA column of the declarations table (the FEMA record places each applicant in this county); do not add this line to the county total.

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
1962-09-051962-09-05DR-133-IAMajor disasterFLOODSInland Flooding
1961-03-311961-03-31DR-111-IAMajor disasterFLOODSInland Flooding
1958-07-051958-07-05DR-86-IAMajor disasterFLOODSInland Flooding
1954-06-231954-06-23DR-17-IAMajor disasterFLOODInland Flooding
1953-06-111953-06-11DR-8-IAMajor 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.

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: 11 rows, $7,881,708.52

Disaster numberDeclaredApplicantCounty field in FEMA dataPA obligatedfederal share obligated, nominal dollarsWhy not placed
45572020-08-17The Evangelical Lutheran Good Samaritan SocietyMinnehaha County$47,682.27county field is a county of another state and the applicant name does not identify a place in the declaring state
44832020-03-23Gundersen Lutheran Health System, IncLa Crosse County$326,644.22county field is a county of another state and the applicant name does not identify a place in the declaring state
44212019-03-23City of BigelowNobles County$80,835.34county field is a county of another state and the applicant name does not identify a place in the declaring state
44212019-03-23Dairyland Power CooperativeLa Crosse County$247,337.47county field is a county of another state and the applicant name does not identify a place in the declaring state
44212019-03-23South Dakota Dept of TransportationHughes County$3,666,245.52county field is a county of another state and the applicant name does not identify a place in the declaring state
44212019-03-23City of Omaha Parks and Recreation Dept(The Omaha Parks and Recreation)Douglas County$379,432.23county field is a county of another state and the applicant name does not identify a place in the declaring state
41842014-07-24South Dakota Dept of TransportationHughes County$1,245,084.61county field is a county of another state and the applicant name does not identify a place in the declaring state
41812014-07-14Lincoln Electric SystemLancaster County$383,692.95county field is a county of another state and the applicant name does not identify a place in the declaring state
41142013-05-06City of BigelowNobles County$5,961.43county field is a county of another state and the applicant name does not identify a place in the declaring state
19982011-06-27Lincoln Electric SystemLancaster County$65,027.74county field is a county of another state and the applicant name does not identify a place in the declaring state
16882007-03-14Dairyland Power CooperativeLa Crosse County$1,433,764.74county 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 Wave20112001996 to 2026-06-30Includes 7 Frost/Freeze records, event types the NRI definition of this hazard leaves out.
Drought308311001996 to 2026-06-30
Earthquake000000No Storm Events record; local data required (e.g., USGS).
Hail95303001955 to 2026-06-30
Heat Wave4000001996 to 2026-06-30
Hurricane0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Ice Storm15000101996 to 2026-06-30
Inland Flooding631011001996 to 2026-06-30
Landslide0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Lightning6000001996 to 2026-06-30
Strong Wind13012116201955 to 2026-06-30Includes 20 High Wind records, event types the NRI definition of this hazard leaves out.
Tornado19022501950 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
Wildfire0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Winter Weather56608001996 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
2024-01-13Extreme Cold/Wind Chill$0 property; $0 crops, reported for the zone (2024 dollars)0, 0NWS zone IAZ094 (DECATUR), zone-level: may include parts of neighboring countiesnew since last plan; within last 5 yearsB1-c worst recorded: Cold/Wind Chill, Extreme Cold/Wind Chill
2023-09-12Drought$0 property; $0 crops, reported for the zone (2023 dollars)0, 0NWS zone IAZ094 (DECATUR), zone-level: may include parts of neighboring countiesnew since last plan; within last 5 yearsB1-c worst recorded: Drought
2021-12-15High Wind72 kt (83 mph) measured gust$0 property; $0 crops, reported for the zone (2021 dollars)0, 0NWS zone IAZ094 (DECATUR), zone-level: may include parts of neighboring countieswithin last 5 yearsB1-c worst recorded: High Wind and Strong Wind (outside NRI Strong Wind definition)
2011-07-15Excessive Heat$135,000 property; $0 crops, reported for the zone (2011 dollars)0, 0NWS zone IAZ094 (DECATUR), zone-level: may include parts of neighboring countiesB1-c worst recorded: Excessive Heat, Heat
2010-06-12Flood$0 property; $20,000,000 crops (2010 dollars)0, 0WESTERVILLE to LAMONIB1-c worst recorded: Flash Flood, Flood, Lakeshore Flood
2009-10-10Frost/Freeze$0 property; $2,500,000 crops, reported for the zone (2009 dollars)0, 0NWS zone IAZ094 (DECATUR), zone-level: may include parts of neighboring countiesB1-c worst recorded: Frost/Freeze (outside NRI Cold Wave definition)
2005-06-04Hail2.75 in$25,000 property; $30,000 crops (2005 dollars)0, 0GRAND RIVERB1-c worst recorded: Hail
2001-04-08Lightning$50,000 property; crops not reported (2001 dollars)0, 0GARDEN GROVEB1-c worst recorded: Lightning
2001-04-08Thunderstorm Wind61 kt (70 mph) estimated$25,000 property; crops not reported (2001 dollars)0, 2LEONdeaths or injuries recorded
2001-04-08Thunderstorm Wind71 kt (82 mph) estimated$5,000 property; crops not reported (2001 dollars)0, 2LEONdeaths or injuries recorded
1989-05-24TornadoF4, 9 mi path length (records before 1996 may include the whole path; rating and listing come from the county where the tornado began), 300 yd wide$25,000,000 property; crops not recorded (1989 dollars)0, 0location not recordedB1-c worst recorded: Tornado
1961-04-23TornadoF2, 9.3 mi path length (records before 1996 may include the whole path; rating and listing come from the county where the tornado began), 600 yd wide$2,500,000 property; crops not recorded (1961 dollars)0, 2location not recordeddeaths or injuries recorded

The full list is in the XLSX file, sheet "B1-d Storm Events history" (438 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 Floodingevents per year at a location (modeled)not shownmodeledsee B1-fNot Applicable in NRI for this county; no descriptor.
Cold Wave4.42event-days per yearabout 4.42 days per yearLikelyevent-days in 10 of 30 years, 1996 to 2025 (33.3%)842005-11-12 to 2024-11-12 (19 years)countywideNRI gives about 4.42 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 10 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.
Drought12.4event-days per yearabout 12.4 days per yearLikelyevent-days in 11 of 30 years, 1996 to 2025 (36.7%)3362000 to 2025 (25.25 years; D3 and D4 only)countywideNRI gives about 12.4 drought event-days a year here (its annualized frequency over 25.25 years; not its event count divided by the years), but Storm Events has a record in only 11 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.
Earthquake0.00078annual probability at a locationchance a given location in the county has at least minor-damage shaking in a year: 0.078%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.
Hail5.38events per yearabout 5.38 per yearHighly likelyFEMA annualized frequency (modeled)204.4 (modeled)1986 to 2023 (38 years)countywide
Heat Wave7.74event-days per yearabout 7.74 days per yearLikelyevent-days in 4 of 30 years, 1996 to 2025 (13.3%)1132005-11-12 to 2024-11-12 (19 years)countywideNRI gives about 7.74 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 4 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.
Hurricane0.00575events per yearabout 1 in 174 yearsUnlikelyFEMA annualized frequency (modeled)21851 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 Storm0.395event-days per yearabout 0.395 days per yearLikelyevent-days in 11 of 30 years, 1996 to 2025 (36.7%)271946-12-31 to 2014-02-12 (67 years)countywide
Inland Flooding1.82event-days per yearabout 1.82 days per yearLikelyevent-days in 18 of 30 years, 1996 to 2025 (60%)511996 to 2023 (28 years)see B1-f
Landslide0.386events per year (modeled)about 1 in 3 yearsLikelyFEMA annualized frequency (modeled)not shownmodeledsee B1-f
Lightning45.6days per year with a strikeabout 45.6 days per yearHighly likelyFEMA annualized frequency (modeled)not shown1995 to 2023 (29 years; CONUS)countywide
Strong Wind4.61events per yearabout 4.61 per yearHighly likelyFEMA annualized frequency (modeled)1761986 to 2023 (38 years)countywide
Tornado0.379events per yearabout 1 in 3 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.
Wildfire0.00127annual probability at a locationchance a given location in the county burns in a year: 0.127%Storm 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)
Winter Weather11.5event-days per yearabout 11.5 days per yearHighly likelyevent-days in 28 of 30 years, 1996 to 2025 (93.3%)2192005-11-12 to 2024-11-12 (19 years)countywide

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 202544301.47
Hail2.00 in+1996 to 20256300.2
Strong Wind (Thunderstorm Wind records)50-64 kt1996 to 202582302.73
Strong Wind (Thunderstorm Wind records)65 kt+1996 to 20258300.267
Strong Wind (Thunderstorm Wind records)unmeasured or below 50 kt1996 to 20250300
TornadoEF0-11996 to 20253300.1
TornadoEF2-31996 to 20251300.0333
TornadoEF4-51996 to 20250300
Tornadounrated (EFU)1996 to 20251300.0333

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 3Not Applicable 3
Coastal Flooding0 of 3Not Applicable 3
Cold Wave3 of 386.894.996.3Very High 1, Relatively High 2National 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.
Drought3 of 393.699.399.7Relatively High 2, Relatively Moderate 1National 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.
Earthquake3 of 321.123.433.8Very Low 3
Hail3 of 379.391.592.3Relatively High 2, Relatively Moderate 1National 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 53% 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.
Heat Wave3 of 390.692.695.4Relatively High 3National 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.
Hurricane3 of 322.431.032.1Very Low 3
Ice Storm3 of 357.862.166.0Relatively Low 3National 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 Flooding3 of 327.670.270.3Relatively Moderate 2, Relatively Low 1
Landslide3 of 384.795.896.4Relatively Moderate 2, Relatively Low 1
Lightning3 of 360.466.578.8Relatively High 1, Relatively Moderate 2National 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 Wind3 of 393.295.896.9Very High 1, Relatively High 2National 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.
Tornado3 of 387.991.196.2Very High 1, Relatively High 2
Tsunami0 of 3Not Applicable 3
Volcanic Activity0 of 3Not Applicable 3
Wildfire3 of 383.287.989.7Relatively Moderate 1, Relatively Low 2
Winter Weather3 of 358.364.672.8Relatively Moderate 3National 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
Decatur CountyCountyApproved, expires 2028-02-13FMA RL 0, SRL 0; any 0$00; 0
Davis City cityCityApproved, expires 2028-02-13FMA RL 0, SRL 0; any 0$45,396.5820; 0
Decatur City cityCityApproved, expires 2028-02-13FMA RL 0, SRL 0; any 0$6,26318; 0
Garden Grove cityCityApproved, expires 2028-02-13FMA RL 0, SRL 0; any 0$4,751.7119; 1
Grand River cityCityApproved, expires 2028-02-13FMA RL 0, SRL 0; any 0$16,143.1431; 1
Lamoni cityCityApproved, expires 2028-02-13FMA RL 0, SRL 0; any 1$135,299.7536; 1
Le Roy cityCityPlan 108540 approved 2023-02-14, pending adoption here; not yet eligibleFMA RL 0, SRL 0; any 0none found6; no approved plan
Leon cityCityApproved, expires 2028-02-13FMA RL 0, SRL 0; any 0$96,855.8551; 2
Pleasanton cityCityPlan 108540 approved 2023-02-14, pending adoption here; not yet eligibleFMA RL 0, SRL 0; any 0$1,648.3521; no approved plan
Van Wert cityCityApproved, expires 2028-02-13FMA RL 0, SRL 0; any 0$5,000.8519; 0
Weldon cityCityApproved, expires 2028-02-13FMA RL 0, SRL 0; any 0$16,436.011; 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 2023-02-14county-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 FloodingNot Applicable in NRI for this county
Cold Wave$2,135,907,112$133,092,8557,645$2,477$281,775$828,8600.000116%$0
Drought$21,680,516$2,256,27610.4% (agriculture)$0NRI has no building exposure for this hazard; agriculture shown
Earthquake$3,624,733,7757,645$17,007$7,0950.000469%
Hail$2,135,907,112$133,092,8557,645$91,837$120,671$16,9760.0043%$0
Heat Wave$2,135,907,112$133,092,8557,645$7,098$3$652,7660.000332%
Hurricane$2,135,592,752$130,729,2387,645$438$881under $1under 0.0001%
Ice Storm$2,135,907,1127,645$19,164$5860.000897%
Inland Flooding$2,135,208,283$12,246,13131$1,522,666$315,994$3,732n/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$34,346,562136$209$7,0440.000609%
Lightning$2,135,907,1127,645$6,519$48,9290.000305%
Strong Wind$2,135,907,112$133,092,8557,645$187,811$25,522$199,3620.00879%$0$0
Tornado$2,135,907,112$133,092,8557,645$522,737$3,397$601,1100.0245%
TsunamiNot Applicable in NRI for this county
Volcanic ActivityNot Applicable in NRI for this county
Wildfire$431,676,924$77,143,5562,745$44,110$697$5,8680.0102%
Winter Weather$2,135,907,112$133,092,8557,645$12,676$148$2670.000593%$0

Totals since 2023-02-14 (Storm Events through 2026-06-30): 13 county-coded records, 13 with a damage value recorded (including $0), $0; 18 zone-level records, 18 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
Population7,645
Building value (total, not at risk)$2,135,907,112
Agriculture value (total, not at risk)$133,092,855
NRI risk rating (all hazards)Very Low
Expected annual loss, buildings and agriculture, all hazards$5,440,113
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)$2,372,594
Social vulnerability ratingRelatively Moderate
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)0Severe repetitive loss, FMA definition (44 CFR 77.2)0
Repetitive loss, NFIP insurance definition1Severe repetitive loss, NFIP insurance definition0

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 total0010100
LAMONI, CITY OF0010100
State level, not in this county: county not reported0010100

Repeat-flood properties by plan member (NFIP community)

MemberNFIP community IDRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredpropertiesNote
Decatur County1908620000000
Davis City city1901090000000
Decatur City city1952310000000
Garden Grove city1907310000000
Grand River city1907360000000
Lamoni city1901100010100
Le Roy city1952300000000
Leon city1901110000000
Pleasanton city1952290000000
Van Wert city1908180000000
Weldon city1952280000000

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 residential0010100
2 to 4 unit residential0000000
other residential0000000
non-residential0000000
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 0 properties are FMA repetitive loss but not NFIP repetitive loss, and 1 property is 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). Decatur County, IA: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-28; County area 19053). 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_IA_19053. Preview: automated baseline.