Hazard Plain Automated baseline

Iroquois County, IL

Risk-assessment baseline packet

County FIPS:
17075
Release:
2026-10
Data as of:
2026-09-30
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.

Hazard Plain release 2026-10, as of 2026-09-30.

Summary

Plan status as of 2026-09-30: Approved, expires 2030-11-16. Plan: Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504), approved 2025-11-17.

Since the plan was approved on 2025-11-17: no new hazard declaration and 41 NOAA Storm Events records; details under "What changed since your last plan".

Highest expected annual loss (FEMA National Risk Index, modeled total; see B1-a): Inland Flooding ($19,865,872 a year), Cold Wave ($10,012,498) and Tornado ($1,636,063).

The tables that follow are organized by the items of FEMA's Local Mitigation Plan Review Tool, Element B (B1-a to B2-c); each heading says which item its tables support.

Plan clock

Status:
Approved, expires 2030-11-16
Plan:
Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)
Approved:
2025-11-17
Days to expiry:
1,508

What changed since your last plan (approved 2025-11-17)

New federal declarations:
none
Storm Events records since approval:
41 records (data through 2026-06-30)
Repetitive loss now:
FMA RL 4, SRL 10 (44 CFR 77.2); any definition: 73
Repeat-flood change:
this release sets the baseline count.

Sources: 1, 2, 4, 6 (numbered list at the end)

Plan status for every jurisdiction listed in this county: 26 rows, in the section "Plan clock: Plan status for every jurisdiction listed in this county" on the following pages.

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

Plan clock

Plan status for every jurisdiction listed in this county

Source: 1

JurisdictionTypeStatusPlanApprovedExpiresDays to expirynegative = days since expiryUpdate underwayNotes
Iroquois CountyCountyApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Ashkum villageVillageApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Beaverville villageVillagePlan 105504 approved 2025-11-17, pending adoption here; not yet eligibleIroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504), pending adoption here2025-11-17 by FEMA; not yet adopted here2030-11-16 once adoptedFEMA tracker shows a plan approvable pending adoptionNot yet eligible: adopt the approved plan.
Chebanse villageVillageApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Danforth villageVillageApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Gilman cityCityApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Watseka cityCityApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Woodland villageVillageApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Belmont townshipTownshipApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508this jurisdiction approved 2026-05-04
Crescent townshipTownshipApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Lovejoy townshipTownshipApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Ridgeland townshipTownshipApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Central Community Unit School District 4School/School DistrictApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Iroquois County Community Unit School District 9School/School DistrictApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Iroquois West Community Unit School District 10School/School DistrictApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Paxton-Buckley-Loda Community Unit School District 10School/School DistrictApproved, expires 2030-12-16Ford County 2025 Hazard Mitigation Plan (FEMA plan 111212)2025-12-172030-12-161,538this jurisdiction approved 2026-05-04
Tri-Point Community Unit School District 6-JSchool/School DistrictApproved, expires 2030-12-16Ford County 2025 Hazard Mitigation Plan (FEMA plan 111212)2025-12-172030-12-161,538this jurisdiction approved 2026-05-04
Ashkum Township Fire Protection DistrictFire/EMS DistrictApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508this jurisdiction approved 2026-05-04
Buckley Fire Protection DistrictFire/EMS DistrictApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Central Citizens' Library DistrictSpecial DistrictApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Crescent-Iroquois Fire Protection DistrictFire/EMS DistrictApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Danforth Fire Protection DistrictFire/EMS DistrictApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508this jurisdiction approved 2026-05-04
Gilman Community Fire Protection DistrictFire/EMS DistrictApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Iroquois-Ford Fire Protection DistrictFire/EMS DistrictApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Loda Fire Protection DistrictFire/EMS DistrictApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508
Wellington-Greer Fire Protection DistrictFire/EMS DistrictApproved, expires 2030-11-16Iroquois County 2025 Hazard Mitigation Plan (FEMA plan 105504)2025-11-172030-11-161,508

Plan 105504 covers 1 other participant: Woodland Fire Protection District (Livingston County).

Supports FEMA checklist item B1-a: hazard identification

Hazards NRI does not cover (local data needed)

  • dam failure (incl. upstream dams)
  • levee failure
  • flash flood as its own subtype
  • ice jams
  • debris flows
  • erosion (riverine and coastal)
  • land subsidence and sinkholes
  • expansive soils

The 18 National Risk Index hazards, ranked by expected annual loss (EAL)

Sources: 5, 6

Rank by EALHazardNRI risk ratingEAL ratingEAL buildingsmodeled dollars per yearEAL agriculturemodeled dollars per yearCost of expected deaths and injuriesFEMA's dollar value per year, not property damageEAL total (see note)modeled dollars per yearStorm Events records, 1996 to 2026-06-30countStorm Events coverage note
1Inland FloodingRelatively ModerateRelatively Moderate$19,390,102$409,297$66,473$19,865,87254
2Cold WaveRelatively HighRelatively High$945$47,586$9,963,968$10,012,49819
3TornadoRelatively LowRelatively Low$1,187,696$5,574$442,793$1,636,06336
4EarthquakeRelatively LowRelatively Low$673,334n/a$217,529$890,862Storm Events does not record earthquakes.
5Strong WindRelatively LowRelatively Low$325,696$13,964$174,105$513,765213Includes 14 High Wind and 3 Strong Wind records (NOAA non-thunderstorm wind types, outside NRI's Strong Wind definition).
6HailRelatively LowRelatively Low$404,006$101,823$1,823$507,65253
7Heat WaveRelatively LowRelatively Low$3,598$8$285,097$288,7039
8LightningRelatively LowRelatively Low$7,646n/a$120,241$127,8882
9Winter WeatherRelatively LowRelatively Low$8,783$1,774$16,053$26,61051
10Ice StormVery LowRelatively Low$16,215n/a$9,836$26,0514
11HurricaneVery LowVery Low$5,907$9,346$1$15,2550No recorded events in Storm Events since 1996 (data through 2026-06-30).
12DroughtVery LowVery Lown/a$7,540n/a$7,54011
13WildfireVery LowVery Low$1,166$10$85$1,2612
14LandslideVery LowVery Low$84n/a$527$6100No recorded events in Storm Events since 1996 (data through 2026-06-30).

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

NRI risk rating combines expected annual loss with social vulnerability and community resilience; EAL rating rates expected annual loss alone. Both compare this county with all U.S. counties.

Local data needed: state and local landslide records (Storm Events records this hazard only in part).

Not applicable to this county per NRI, with no federal declaration and no Storm Events record since 1996: avalanche, coastal flooding, tsunami and volcanic activity. That is the evidence for leaving them out of the plan.

The state hazard mitigation plan also lists hazards for this county; FEMA asks the plan to explain any hazard it leaves out.

Supports FEMA checklist item B1-b: hazard location

Affects the whole county (national data give no location within it): Cold Wave, Drought, Hail, Heat Wave, Ice Storm, Lightning, Strong Wind and Winter Weather.

Inland Flooding: The FEMA Flood Insurance Rate Map (FIRM) is the required location source for flooding. See the FEMA Flood Map Service Center (https://msc.fema.gov) for this county.

Hazards that vary within the county: highest-rated census tracts

Source: 5

HazardHighest-rated census tractsNRI risk rating, score 0 to 100
Earthquaketract 9507 (Relatively Low, 77.0); tract 9505 (Relatively Low, 76.0); tract 9506 (Relatively Low, 75.5)
Hurricanetract 9509 (Very Low, 43.5); tract 9505 (Very Low, 42.5); tract 9501 (Very Low, 41.4)
Landslidetract 9507 (Relatively Low, 84.6); tract 9503 (Relatively Low, 81.1); tract 9509 (Very Low, 79.6)
Tornadotract 9505 (Relatively High, 80.3); tract 9504 (Relatively High, 80.3); tract 9507 (Relatively High, 75.9)
Wildfiretract 9507 (Very Low, 52.0); tract 9509 (Very Low, 51.5); tract 9505 (Very Low, 47.4)

Up to 3 census tracts per hazard, highest National Risk Index rating first, then highest score; a tract number is the Census tract number (for example 9507 is Census Tract 9507). FEMA's Resilience Analysis and Planning Tool maps the National Risk Index for every tract: https://www.fema.gov/emergency-managers/practitioners/resilience-analysis-and-planning-tool

Supports FEMA checklist item B1-c: hazard extent

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

Sources: 6, 7

HazardScaleRecordscount and yearsObserved rangeWorst recorded eventMost damaging (when different)How it applies to jurisdictionsNote
Cold/Wind Chill, Extreme Cold/Wind Chillwind chill19 records, 1996 to 2026 (19 zone-level)1 day to 4 days (median 2 days); 16 with a recorded value4 consecutive days, 2011-01-21 to 2011-01-24, 1 direct death, zone-levelCountywide (zone-level records).
Frost/Freeze (outside NRI's Cold Wave definition)crop damage0
DroughtU.S. Drought Monitor scale (D0 to D4)11 records, 2005 to 2026 (11 zone-level)16 days to 128 days (median 29 days); 5 with a recorded value128 days (about 4.2 months), 2025-12-01 to 2026-04-07, a run of 5 consecutive Storm Events drought records, zone-levelCountywide (zone-level records).Storm Events enters a drought at D2 or worse east of the Rockies and D3 or worse from the Rockies west (NWS Instruction 10-1605); NRI drought counts D3 and D4 only.
EarthquakeModified Mercalli (local data)0Storm Events does not record earthquakes; the USGS earthquake catalog is the source.
Hailhail size (inches)73 records, 1960 to 20240.75 in to 3 in (median 1 in); 73 with a recorded value3 in hail, 1980-06-07Hail, 2006-04-14, $300,000 property; crops not reported (2006 dollars)Event records naming jurisdictions in the plan: Watseka city (7 records), Chebanse village (6 records), Gilman city (6 records), Ashkum village (5 records), Woodland village (2 records), Beaverville village (1 record), Danforth village (1 record).
Excessive Heat, Heatheat index (in event narratives)9 records, 2012 to 2026 (9 zone-level)1 day to 4 days (median 2 days); 9 with a recorded value4 consecutive days, 2012-07-04 to 2012-07-07, zone-levelCountywide (zone-level records).
Hurricane, Tropical Storm, Tropical DepressionSaffir-Simpson0Storm Events files every zone of a storm's episode under the storm's type; flooding from the storm is filed as Flood or Flash Flood records.
Ice StormSperry-Piltz ice scale (local data)4 records, 2007 to 2021 (4 zone-level)No damage reported in 4 records.Countywide (zone-level records).
Flash Flood, Flood, Lakeshore Flooddamage and flood days (flood depth: FIRM)54 records, 1996 to 2023 (3 zone-level)Flood, 2008-01-08, $3,000,000 property; $0 crops (2008 dollars)Event records naming jurisdictions in the plan: Chebanse village (9 records), Watseka city (7 records), Ashkum village (3 records), Danforth village (1 record), Gilman city (1 record), Woodland village (1 record). Zone-level records (3) apply countywide.Flood depth: see the FEMA Flood Insurance Rate Map. Storm Events damage is often $0 or blank for floods, major ones included; FEMA Public Assistance by declaration (B1-d) shows which floods cost the most.
Debris Flownone (count and damage only)0
Lightningannualized frequency (the measure FEMA's Local Mitigation Planning Handbook names)2 records, 2000 to 2005Lightning, 2005-07-20, $100,000 property; crops not reported (2005 dollars)Event records naming jurisdictions in the plan: Watseka city (1 record), Woodland village (1 record).Storm Events lists lightning with damage or casualties.
High Wind and Strong Wind (outside NRI's Strong Wind definition)wind speed (kt and mph)17 records, 1996 to 2026 (17 zone-level)43 kt (49 mph) to 61 kt (70 mph) (median 50 kt (58 mph)); 16 with a recorded value61 kt (70 mph) measured gust, High Wind, 2026-01-14; NWS zone ILZ033Strong Wind, 2008-05-11, $100,000 property; $0 crops (zone total, 2008 dollars)Countywide (zone-level records).
Thunderstorm Windwind speed (kt and mph)237 records, 1958 to 202650 kt (58 mph) to 87 kt (100 mph) (median 55 kt (63 mph)); 205 with a recorded value87 kt (100 mph) estimated gust, Thunderstorm Wind, 2012-05-06Thunderstorm Wind, 2006-07-27, $700,000 property; $12,000 crops (2006 dollars)Event records naming jurisdictions in the plan: Watseka city (37 records), Ashkum village (12 records), Gilman city (7 records), Chebanse village (5 records), Danforth village (5 records), Beaverville village (4 records), Woodland village (2 records).
TornadoEnhanced Fujita (Fujita before Feb 2007)64 records, 1954 to 2026F/EF0 to F/EF3 (median F/EF1); 57 with a recorded valueF3 tornado, 1956-03-06, 9.4 mi path length (whole path, pre-1996), 500 yd wide, $250,000 property; crops not recorded (1956 dollars), 6 direct injuriesTornado, 1991-03-22, $2,500,000 property; crops not recorded (1991 dollars)Event records naming jurisdictions in the plan: Ashkum village (6 records), Watseka city (4 records), Beaverville village (2 records), Woodland village (2 records), Chebanse village (1 record), Danforth village (1 record), Gilman city (1 record).Before 1996 a tornado is listed once, under the county where it began, with its whole path's rating and length; from 1996 on, each county lists its own segment. Length is not used to rank tornadoes (see Methods).
Wildfireacres burned (local data)2 records, 2020 to 2025 (2 zone-level)Wildfire, 2025-10-05, $0 property; $10,000 crops (2025 dollars); NWS zone ILZ033Countywide (zone-level records).
Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleetnone in data (snowfall: local data)51 records, 1997 to 2026 (51 zone-level)No damage reported in 51 records.Countywide (zone-level records).

In event narratives only (local data needed): wind chill, temperature, heat index, ice thickness, acres burned and snow depth; any physical measure of debris flow and lightning.

Storm Events records are more complete after 1996; before 1996 only Tornado (from 1950), Hail and Thunderstorm Wind (from 1955) exist. Zone-level records from zones that no NWS zone-county file places in this county (mostly before 2020) are not counted here (the Methods page explains the zone matching).

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

Supports FEMA checklist item B1-d: previous occurrences

Federal declarations for this county: 9 declarations covering 6 separate hazard incidents counted in this packet (declarations for the same incident count once; non-natural and evacuation-only declarations are not counted).

Federal disaster declarations for this county

Sources: 1, 2, 3

DeclaredIncident beganFEMA numberTypeTitleMapped hazardCounty Public Assistancefederal share obligated, nominal dollarsNotes
2020-03-262020-01-20DR-4489-ILMajor disasterCOVID-19 PandemicNon-natural, not counted$304,325.60
2020-03-132020-01-20EM-3435-ILEmergencyCOVID-19Non-natural, not countedno Public Assistance recordedsame incident as DR-4489
2008-03-072008-01-07DR-1747-ILMajor disasterSevere Storms and FloodingInland FloodingPA not declared for this county
2005-09-072005-08-29EM-3230-ILEmergencyHurricane Katrina EvacuationHurricane: evacuation support, not a local hazard event; not countedno Public Assistance recorded
2002-05-212002-04-21DR-1416-ILMajor disasterSevere Storms, Tornadoes and FloodingTornado (primary); also designated: Inland FloodingPA not declared for this county
2001-01-172000-12-11EM-3161-ILEmergencyIllinois Winter Snow StormsWinter Weather$48,435.89
1999-01-081999-01-01EM-3134-ILEmergencyIl-Winter Storm 1/1/99Winter Weather$19,473
1994-04-261994-04-09DR-1025-ILMajor disasterSevere Storms and FloodingInland Floodingno Public Assistance recorded
1990-03-061990-02-14DR-860-ILMajor disasterSevere Ice StormIce Stormno Public Assistance recorded

County Public Assistance: applicants the FEMA record places in this county, including any state agencies FEMA files there; statewide rows are listed on the state page; federal share obligated, nominal dollars.

Statewide declarations

Source: 2

DeclaredIncident beganFEMA numberTypeTitleMapped hazard
1961-05-271961-05-27DR-115-ILMajor disasterFloods & TornadoesInland Flooding (primary); also designated: Tornado
1957-06-221957-06-22DR-78-ILMajor disasterFloodsInland Flooding

FEMA recorded these with designated area Statewide and no county, so they are listed on every county page in the state and not counted with county rows. Local data needed: whether each one affected this county.

Public Assistance filed under this county for declarations that do not list it: 1 row, $750

Sources: 2, 3

FEMA numberDeclaredTitleApplicantPA obligatedfederal share obligated, nominal dollars
DR-1771-IL2008-06-24Severe Storms and FloodingSTITES (TOWNSHIP OF)$750

FEMA's Public Assistance summaries file these applicants under this county, but FEMA's declaration rows for these disasters do not designate it (an electric cooperative or district serving several counties, for example). Not in any declaration row above and not counted.

Public Assistance not placed in any Illinois county: 1 row, $797,909.42; listed on the Illinois state page.

Source: 3

Previous occurrences by hazard, with explicit no-event rows

Sources: 2, 6, 7

HazardStorm Events records, all years on file(years in the Period column)Since plan approvalrecordsIn the 12 months before plan approvalrecordsLast 5 yearsrecordsDeclared incidents, all yearsseparate disastersDeclared since approvalseparate disastersPeriodStatement
Cold Wave19408001996 to 2026-06-30
Drought115110001996 to 2026-06-30
Earthquake000000Storm Events does not record earthquakes; the USGS earthquake catalog is the source.
Hail73005001955 to 2026-06-30
Heat Wave9128001996 to 2026-06-30
Hurricane0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Ice Storm4000101996 to 2026-06-30
Inland Flooding54006301996 to 2026-06-30
Landslide0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Lightning2000001996 to 2026-06-30
Strong Wind254131141001955 to 2026-06-30Includes 14 High Wind and 3 Strong Wind records.
Tornado6411317101950 to 2026-06-30
Wildfire2011001996 to 2026-06-30
Winter Weather517317201996 to 2026-06-30

Notable Storm Events records

Sources: 1, 6, 7

DateEvent typeMagnitude or extentDamagenominal dollarsDeaths, injuriesdirect onlyLocationFlagsWhy listed
2026-01-14High Wind61 kt (70 mph) measured gust$0 property; $0 crops (zone total, 2026 dollars)0, 0NWS zone ILZ033 (IROQUOIS), zone-levelnew since last plan; within last 5 yearsB1-c worst recorded: High Wind and Strong Wind
2025-12-01Drought$0 property; $0 crops (zone total, 2025 dollars)0, 0NWS zone ILZ033 (IROQUOIS), zone-levelnew since last plan; within last 5 yearsB1-c worst recorded: Drought
2025-10-05Wildfire$0 property; $10,000 crops (zone total, 2025 dollars)0, 0NWS zone ILZ033 (IROQUOIS), zone-levelin the 12 months before plan approval; within last 5 yearsB1-c worst recorded: Wildfire
2012-07-04Excessive Heat$0 property; $0 crops (zone total, 2012 dollars)0, 0NWS zone ILZ033 (IROQUOIS), zone-levelB1-c worst recorded: Excessive Heat, Heat
2012-05-06Thunderstorm Wind87 kt (100 mph) estimated gust$50,000 property; $0 crops (2012 dollars)0, 0CRESCENT CITY to WATSEKAB1-c worst recorded: Thunderstorm Wind
2011-01-21Cold/Wind Chill$0 property; $0 crops (zone total, 2011 dollars)1, 0NWS zone ILZ033 (IROQUOIS), zone-leveldeaths or injuries recorded
2008-01-08Flood$3,000,000 property; $0 crops (2008 dollars)0, 0CHEBANSE to LODAB1-c worst recorded: Flash Flood, Flood, Lakeshore Flood
2005-07-20Lightning$100,000 property; crops not reported (2005 dollars)0, 0WOODLANDB1-c worst recorded: Lightning
2004-01-06Cold/Wind Chilldamage not reported1, 0NWS zone ILZ033 (IROQUOIS), zone-leveldeaths or injuries recorded
1991-03-22TornadoF1, 1 mi path length (whole path, pre-1996), 100 yd wide$2,500,000 property; crops not recorded (1991 dollars)0, 0location not recordedB1-c most damaging: Tornado
1980-06-07Hail3 indamage not recorded (pre-1996 record)0, 0location not recordedB1-c worst recorded: Hail
1956-03-06TornadoF3, 9.4 mi path length (whole path, pre-1996), 500 yd wide$250,000 property; crops not recorded (1956 dollars)0, 6location not recordeddeaths or injuries recorded

The full list is in the Excel file, sheet "B1-d Storm Events history" (543 rows).

Location is the place NOAA recorded, as written in its data; it need not be a jurisdiction in this plan.

Local data needed: state-declared emergencies, from your state emergency management agency (federal data do not include them).

FEMA's declaration data list no tribal or special-area declarations for this state.

Supports FEMA checklist item B1-e: probability of future events

Probability: FEMA annualized frequency and descriptor per hazard

Sources: 5, 6

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
Cold Wave3.63event-days per yearabout 3.63 days per yearLikelyStorm Events event-days in 12 of 30 years, 1996 to 2025 (40%)692005-11-12 to 2024-11-12 (19 years)countywide
Drought0.251event-days per yearabout 0.251 days per yearLikelyStorm Events event-days in 4 of 30 years, 1996 to 2025 (13.3%)492000 to 2025 (25.25 years; D3 and D4 only)countywide
Earthquake0.00176annual probability at a locationchance a given location in the county has at least minor-damage shaking in a year: 0.176%not shownmodeledsee B1-fNo descriptor (Storm Events does not record earthquakes).
Hail3.09events per yearabout 3.09 per yearHighly likelyFEMA annualized frequency (modeled)117.4 (modeled)1986 to 2023 (38 years)countywide
Heat Wave4.74event-days per yearabout 4.74 days per yearLikelyStorm Events event-days in 5 of 30 years, 1996 to 2025 (16.7%)742005-11-12 to 2024-11-12 (19 years)countywide
Hurricane0.0107events per yearabout 1 in 93 yearsPossibleFEMA annualized frequency (modeled)41851 to 2024 (Atlantic)see B1-fNRI counts hurricane and tropical storm tracks passing within storm-force wind range; federal declarations are in B1-d.
Ice Storm0.977event-days per yearabout 0.977 days per yearLikelyStorm Events event-days in 3 of 30 years, 1996 to 2025 (10%)661946-12-31 to 2014-02-12 (67 years)countywide
Inland Flooding1.39event-days per yearabout 1.39 days per yearLikelyStorm Events event-days in 21 of 30 years, 1996 to 2025 (70%)391996 to 2023 (28 years)see B1-f
Landslide0.183events per year (modeled)about 1 in 5 yearsLikelyFEMA annualized frequency (modeled)not shownmodeledsee B1-f
Lightning45.8days per year with a strikeabout 45.8 days per yearHighly likelyFEMA annualized frequency (modeled)not shown1995 to 2023 (29 years; CONUS)countywide
Strong Wind4.62events per yearabout 4.62 per yearHighly likelyFEMA annualized frequency (modeled)1761986 to 2023 (38 years)countywide
Tornado1.02events per yearabout 1.02 per yearHighly likelyFEMA annualized frequency (modeled)not shown1950 to 2023 (EF2+); 1986 to 2023 (EF0-1)see B1-f
Wildfire0.0000351annual probability at a locationchance a given location in the county burns in a year: 0.00351%PossibleStorm Events records in 2 of 30 years, 1996 to 2025 (6.67%)not shownmodeledsee B1-f
Winter Weather9.95event-days per yearabout 9.95 days per yearLikelyStorm Events event-days in 20 of 30 years, 1996 to 2025 (66.7%)1892005-11-12 to 2024-11-12 (19 years)countywide

FEMA annualized frequency (modeled) is the National Risk Index v1.20 (December 2025) estimate of how often a hazard affects this county in a year; it is not recorded events divided by years, and its unit differs by hazard (events, event-days, or days with a lightning strike per year). For earthquake, wildfire, coastal flooding and tsunami the value is the chance (or number of events) at a location in the county, not across the county, so no "1 in N years" is given and the descriptor comes from Storm Events where it has a record (none for earthquake). The Methods page gives each hazard's method, from FEMA's National Risk Index Technical Documentation v1.20.

Where NRI gives event-days, the descriptor comes from the share of years with a Storm Events record; NRI's source records more events, so the two differ.

Descriptor scale used in this packet (defined per unit)

Sources: 5, 6

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

Intensity bands: historical frequency (Storm Events)

Source: 6

HazardBandYearsEventscounty-coded recordsYears in periodEvents per yearevents / years
Hail1.00-1.99 in1996 to 202535301.17
Hail2.00 in+1996 to 20254300.133
Thunderstorm Wind (counted as NRI Strong Wind)50-64 kt1996 to 2025159305.3
Thunderstorm Wind (counted as NRI Strong Wind)65 kt+1996 to 202525300.833
Thunderstorm Wind (counted as NRI Strong Wind)unmeasured or below 50 kt1996 to 20252300.0667
TornadoEF0-11996 to 202523300.767
TornadoEF2-31996 to 20250300
TornadoEF4-51996 to 20250300
Tornadounrated (EFU)1996 to 20256300.2

The bands show how often events of each severity were recorded in this county, to profile how severe events have been (FEMA's probability item asks for the range of intensities).

Hail smaller than 1 inch is not counted: on 2010-01-05 the National Weather Service raised its severe-hail threshold from 3/4 inch to 1 inch, so smaller reports became less common after 2009 (NWS Service Change Notice 09-52). NRI hail frequency uses a 0.75 inch threshold.

Optional: future conditions. Not a required item in the 2025 FEMA Local Mitigation Planning Policy Guide; some states ask for it. The federal Climate Mapping for Resilience and Adaptation (CMRA) site gives county exposure to future climate conditions (https://resilience.climate.gov/).

Supports FEMA checklist item B1-f: hazards that vary across jurisdictions

Range of census tract risk within the county

Source: 5

HazardTractsrated of allNRI risk score, 0 to 100Tracts by rating
MinMedianMax
Cold Wave9 of 998.299.299.7Very High 9
Drought2 of 983.383.984.6Relatively Low 2, No Rating 7
Earthquake9 of 969.573.477.0Relatively Low 9
Hail9 of 981.885.186.4Relatively Moderate 9
Heat Wave9 of 933.543.660.3Relatively Moderate 1, Relatively Low 8
Hurricane9 of 931.137.743.5Very Low 9
Ice Storm9 of 927.833.348.0Relatively Low 4, Very Low 5
Inland Flooding9 of 986.892.299.7Very High 2, Relatively High 7
Landslide9 of 952.178.984.6Relatively Low 2, Very Low 7
Lightning9 of 947.556.071.9Relatively Moderate 7, Relatively Low 2
Strong Wind9 of 973.782.086.1Relatively High 4, Relatively Moderate 5
Tornado9 of 965.171.580.3Relatively High 3, Relatively Moderate 6
Wildfire9 of 932.041.552.0Very Low 9
Winter Weather9 of 948.154.062.5Relatively Moderate 8, Relatively Low 1

Drought: Agriculture is all of NRI's expected annual loss for this hazard in the county, so the tract range mostly reflects where crop and livestock value is.

Rated tracts only: No Rating (score 0.0), Not Applicable and Insufficient Data tracts are counted but not used for the minimum, median and maximum.

The score ranks a tract against all U.S. tracts (100 = highest). The rating is FEMA's category for the tract's risk value, computed differently, so the two can disagree.

Frequency data for cold wave, drought, hail, heat wave, ice storm, lightning, strong wind and winter weather are county-wide or coarse (49 km grid or NWS zone), the same for every jurisdiction; the tract range mostly reflects where buildings and people are (crop and livestock value where a line above names agriculture).

Each jurisdiction (starting figures from federal data)

Sources: 1, 3, 4, 6

JurisdictionTypePlan statusRepetitive lossFMA RL and SRL (44 CFR 77.2); repeat-flood, any definitionPublic Assistance to this jurisdictionFEMA records matched by applicant name; federal share obligated, nominal dollarsEvent records naming this placeall years; since its planNotes
Iroquois CountyCountyApproved, expires 2030-11-16FMA RL 1, SRL 2; any 10$1,552.500 total; 0 since its plan
Ashkum villageVillageApproved, expires 2030-11-16FMA RL 0, SRL 0; any 0no Public Assistance recorded26 total; 1 since its plan
Beaverville villageVillagePlan 105504 approved 2025-11-17, pending adoption here; not yet eligibleFMA RL 0, SRL 0; any 0no Public Assistance recorded7 total; no approved plan
Chebanse villageVillageApproved, expires 2030-11-16FMA RL 0, SRL 0; any 0$1,30221 total; 1 since its plan
Danforth villageVillageApproved, expires 2030-11-16FMA RL 0, SRL 0; any 0no Public Assistance recorded8 total; 0 since its plan
Gilman cityCityApproved, expires 2030-11-16FMA RL 0, SRL 0; any 0no Public Assistance recorded15 total; 0 since its plan
Watseka cityCityApproved, expires 2030-11-16FMA RL 3, SRL 7; any 59$24,025.1356 total; 4 since its plan
Woodland villageVillageApproved, expires 2030-11-16FMA RL 0, SRL 1; any 1no Public Assistance recorded8 total; 2 since its plan
Belmont townshipTownshipApproved, expires 2030-11-16no Public Assistance recorded0 total; 0 since its planNo NFIP community ID on this jurisdiction's plan row.
Crescent townshipTownshipApproved, expires 2030-11-16no Public Assistance recorded0 total; 0 since its planNo NFIP community ID on this jurisdiction's plan row.
Lovejoy townshipTownshipApproved, expires 2030-11-16no Public Assistance recorded0 total; 0 since its planNo NFIP community ID on this jurisdiction's plan row.
Ridgeland townshipTownshipApproved, expires 2030-11-16no Public Assistance recorded0 total; 0 since its planNo NFIP community ID on this jurisdiction's plan row.

Repetitive-loss counts are for whole NFIP communities, which can extend beyond this county (see the note in B2-c).

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

County Public Assistance in B1-d also includes applicants filed under the county that are not jurisdictions in this plan (for example state agencies, special districts and nonprofits), so the jurisdiction rows add up to less.

Supports FEMA checklist items B2-a and B2-b: vulnerability and potential impacts

Local data needed

The table below gives county-level starting figures; the plan describes impacts for each jurisdiction and its own assets.

  • Critical facilities and lifelines per hazard
  • A problem statement per jurisdiction per hazard
  • Changes in development in hazard-prone areas since the last approval, or a statement of none (E1-a)
  • Future assets

County-level starter: exposure, expected annual loss and damage since the plan

Sources: 1, 2, 3, 5, 6, 7

HazardBuilding exposuremodeled dollarsAgriculture exposuremodeled dollarsPopulation exposedpeopleEAL buildingsmodeled dollars per yearEAL agriculturemodeled dollars per yearCost of expected deaths and injuriesFEMA's dollar value per year, not property damageEAL as % of exposurebuildings; agriculture where notedStorm Events damage since 2025-11-17county-coded records, property plus crops, nominal dollarsZone-level damage since planproperty plus crops, reported for the zonePublic Assistance since plannominal dollars; see noteNote
Cold Wave$9,822,721,210$541,385,30927,072$945$47,586$9,963,968under 0.0001%$0
Droughtn/a$6,404,787n/an/a$7,540n/a0.118% (agriculture)$0NRI has no building exposure for this hazard; agriculture shown
Earthquake$16,817,759,847n/a27,077$673,334n/a$217,5290.004%
Hail$9,822,721,210$541,385,30927,072$404,006$101,823$1,8230.00411%
Heat Wave$9,822,721,210$541,385,30927,072$3,598$8$285,097under 0.0001%$0
Hurricane$9,772,633,445$525,305,24126,969$5,907$9,346$1under 0.0001%
Ice Storm$9,819,461,721n/a27,064$16,215n/a$9,8360.000165%
Inland Flooding$9,812,323,506$31,371,5903,220$19,390,102$409,297$66,473n/a (see note)NRI counts the full building value of any census block with some flood loss; this is not the value of buildings in the floodplain. Use local FIRM overlays for B2-a/B2-b.
Landslide$28,968,783n/a65$84n/a$5270.000289%
Lightning$9,822,721,210n/a27,072$7,646n/a$120,241under 0.0001%
Strong Wind$9,822,721,210$541,385,30927,072$325,696$13,964$174,1050.00332%$0$0
Tornado$9,822,721,210$541,385,30927,072$1,187,696$5,574$442,7930.0121%$0
Wildfire$862,204,548$26,699,5442,407$1,166$10$850.000135%
Winter Weather$9,822,721,210$541,385,30927,072$8,783$1,774$16,053under 0.0001%$0

Totals since 2025-11-17 (Storm Events through 2026-06-30): 22 county-coded records, 22 with a damage value recorded (including $0), $0; 19 zone-level records, 19 with a damage value recorded (including $0), $0 reported for the zone; Public Assistance: no counted declaration since the plan.

FEMA does not split Public Assistance by hazard. A declaration mapped to several hazards is listed under each of them with its full amount, so the per-hazard column does not add up to the total; the unit total counts each declaration once.

NRI computes earthquake exposure on its own basis, so it exceeds the county building value in B2-a.

Supports FEMA checklist item B2-a: vulnerability (county context)

County context

Source: 5

MeasureValue
Population27,072
Building value (total, not at risk)$9,822,721,210
Agriculture value (total, not at risk)$541,385,309
NRI risk rating (all hazards)Relatively Low
Expected annual loss, buildings and agriculture, all hazards$22,622,100
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)$11,298,530
Social vulnerability ratingRelatively Low
Community resilience ratingRelatively High
NRI versionDecember 2025

FEMA's all-hazard expected annual loss adds buildings, agriculture and population equivalence; this table gives the property part and the population-equivalence part as separate rows.

Social vulnerability: higher means people are more likely to be harmed and slower to recover. Community resilience: lower means the community is less able to recover. High social vulnerability and low resilience both raise the NRI risk rating.

Supports FEMA checklist item B2-c: repetitive loss properties

Repetitive loss in this county, both definitions

Sources: 1, 4

DefinitionPropertiesSevere repetitive lossProperties
Repetitive loss, FMA definition (44 CFR 77.2)4Severe repetitive loss, FMA definition (44 CFR 77.2)10
Repetitive loss, NFIP insurance definition67Severe repetitive loss, NFIP insurance definition7

The state NFIP coordinator's list, the source FEMA's Handbook names, often uses the NFIP insurance definition (second row).

Repeat-flood properties: county and state-level rows

Sources: 1, 4

ScopeRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
County total41067773524
of which: Cissna Park village (community ID not in plan data)0020200
of which: Milford village (community ID not in plan data)0010100
of which: Watseka city3754559422
of which: Iroquois County (unincorporated area)12911012
of which: Woodland village0111100
Statewide, no county in FEMA's file0050500

The statewide row counts properties FEMA's file gives with no county in this state; they are listed for reference and are not in this county's counts.

Repeat-flood properties by jurisdiction in the plan (NFIP community)

Sources: 1, 4

JurisdictionNFIP community IDRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
Iroquois County17073112911012
Ashkum village1702870000000
Beaverville village1711540000000
Chebanse village1702880000000
Danforth village1702920000000
Gilman city1702930000000
Watseka city1702973754559422
Woodland village1708190111100

Counts by occupancy group for each jurisdiction are in the Excel file, sheet "B2-c Jurisdictions".

Jurisdiction rows are whole NFIP communities and need not add up to the county total: a community that extends into another county is counted in full on each jurisdiction row, while the county table counts only its part in this county.

County repeat-flood properties by occupancy group

Sources: 1, 4

Occupancy groupRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
single-family residential4859565521
2 to 4 unit residential0010100
other residential0131303
non-residential0141400
not reported0000000

FEMA's occupancy groups have no institutional class; institutional properties are counted in non-residential or other residential in the table by occupancy group.

FMA RL and FMA SRL are the Flood Mitigation Assistance definitions (44 CFR 77.2), the ones the FEMA Local Mitigation Planning Policy Guide cites. NFIP repetitive loss (the FEMA insurance definition) is 2 or more claims over $1,000 in 10 years, and a property can leave that group once it is mitigated. Also shown: NFIP severe repetitive loss, any category, mitigated and currently insured. The Methods page gives the OpenFEMA field details.

Counts are aggregates of FEMA's public NFIP Multiple Loss Properties file (FEMA's data date 2026-08-02; file version 2026-08-04). No property is identified. County assignment is FEMA's geocode.

In this county 4 properties are FMA repetitive loss but not NFIP repetitive loss, and 67 properties are NFIP repetitive loss but not FMA repetitive loss.

Exact counts; no count suppression.

Sources

Tables cite these sources by number. The full list, for the plan's bibliography (FEMA review item A4-a):

  1. FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-29T134039Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)
  2. FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-29T162832Z, pulled 2026-09-30, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)
  3. FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-29T150754Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries (API)
  4. FEMA, OpenFEMA NfipMultipleLossProperties v1, version 2026-08-04T164045Z, pulled 2026-09-30, 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 2026-09-30, https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_Counties.zip (download, 25 MB), https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_CensusTracts.zip (download, 635 MB)
  6. NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-30, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/
  7. NOAA National Weather Service, NWS county-public forecast zones correlation file, version bp03mr20 to bp16ap26 (11 files; newest bp16ap26), pulled 2026-09-30, https://www.weather.gov/gis/ZoneCounty
  8. U.S. Census Bureau, Census 2024 Gazetteer, 2020 place by county, CT county-to-cousub crosswalk, version 2024-gazetteer, pulled 2026-09-30, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_counties_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_cousubs_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_place_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_unsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_elsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_scsd_national.zip, https://www2.census.gov/geo/docs/reference/codes2020/national_place_by_county2020.txt, https://www2.census.gov/geo/docs/reference/ct_change/ct_cou_to_cousub_crosswalk.xlsx (used to match place names and codes; no table prints its values)

What this packet is and what the plan adds

This packet is the federal data for the plan's risk assessment (the summary on page 1 says how it is organized); the plan and FEMA's review decide whether each item is met.

The plan adds what only the community has: local data on assets, critical facilities, development and each jurisdiction's impacts; local hazard history, including state-declared emergencies; the mitigation strategy; and adoption.

How the federal data are built: National Risk Index values are FEMA's model, not counts of events. Storm Events is more complete from 1996; zone-level records are placed by forecast zone, not by location in the county. Public Assistance for a jurisdiction is matched by applicant name. The Methods page gives every rule and the known edge cases.

OpenFEMA disclaimer

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

Reuse, citation and corrections

Reuse and citation: Hazard Plain text and tables are licensed under Creative Commons Attribution 4.0 International (CC BY 4.0, https://creativecommons.org/licenses/by/4.0/); credit Hazard Plain and the release. The underlying federal data are public domain; OpenFEMA data are also subject to the OpenFEMA terms and conditions.

Cite this: Hazard Plain (2026). Iroquois County, IL: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; County FIPS 17075). Automated baseline. https://hazardplain.org/il/17075/ 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: [email protected]