States › Illinois › St. Clair County
St. Clair County, Illinois
Recorded hazard history: storm events since 1950, federal disaster declarations since 1953, flood insurance claims since 1978, and FEMA's risk index.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. NCEI storm records through 30 Jun 2026; OpenFEMA declarations refreshed 1 Oct 2026; NFIP claims as of 8 Sep 2026.
St. Clair County, Illinois, has 1,047 weather events in the NCEI Storm Events record since 1950, most of them damaging wind.
That is 159.2 events per 100 square miles, above the Illinois figure of 120.2, and 41.1 per 10,000 residents against 52.7 statewide.
16 events fall in the 12 months to 30 Jun 2026. NCEI attributes 33 deaths and 302 injuries to events in the county, with property damage estimated at $32M and crop damage at $9K.
FEMA has designated the county in 19 federal disaster declarations since 1953; the most recent is Severe Storms, Tornadoes, Straight-Line Winds, And Floodng (major disaster, 20 Sep 2024).
National Flood Insurance Program policyholders in the county filed 1,469 claims since 1978, of which 1,011 were paid, totalling $7.8M (about $8K per paid claim). FEMA counts 1,007 residential flood policies in force.
FEMA's National Risk Index rates the county's overall risk as "Relatively High" and its expected annual loss as "Relatively Moderate" ($175M a year across 18 hazards).
3 tropical storm or hurricane tracks in the HURDAT2 record passed within 100 miles of the county's centre at tropical-storm strength or more, 0 of them within 50 miles at hurricane strength.
Compared with Illinois and the United States
| Measure | St. Clair County | Illinois | US |
|---|---|---|---|
| Recorded events since 1950 | 1,047 | 66,722 | 1,977,440 |
| Events per 100 square miles | 159.2 | 120.2 | 56.0 |
| Events per 10,000 residents | 41.1 | 52.7 | 59.6 |
| Events in the last 12 months | 16 | 3,232 | 62,008 |
| Deaths recorded by NCEI | 33 | 1,148 | 26,435 |
| Property damage (NCEI estimates) | $32M | $6.9B | $575B |
| NFIP claims per 1,000 residents | 5.8 | 4.2 | 8.1 |
| Average paid NFIP claim | $8K | $14K | $43K |
| Claims per 100 policies in force, last 10 years | 28.3 | 21.1 | 16.1 |
County-recorded events plus zone-recorded events whose forecast zone is named for the county. State and US rows include events recorded only by forecast zone. Rates use 2021 Census population and land area.
Events by decade
Trend: 518 events in the 20 years to 2025 against 385 in the 20 years before. Reporting practice changed in 1996 and again with automated reports in the 2000s, so decade totals measure the record as much as the weather.
Events by type
Hazard pages exist for hail, tornado, flood, wind and winter where the county has at least 10 recorded events. "Other" covers heavy rain, debris flow, dust, funnel clouds and similar reports.
Largest recorded events
| Date | Event type | Group | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|---|
| 18 Jul 1999 | Heat | Heat | — | — | — | 7 | 100 | Forecast zone |
| 25 Feb 1956 | Tornado | Tornado | F4 | $2.5M | — | 6 | 20 | County |
| 15 May 1968 | Tornado | Tornado | F3 | $250K | — | 4 | 60 | County |
| 17 Jul 2011 | Excessive Heat | Heat | — | — | — | 2 | — | Forecast zone |
| 23 Jun 1998 | Heat | Heat | — | — | — | 1 | 34 | Forecast zone |
| 15 Nov 1989 | Thunderstorm Wind | Wind | 81 mph | — | — | 1 | 20 | County |
| 2 Apr 2006 | Tornado | Tornado | F2 | — | — | 1 | 11 | County |
| 5 Apr 1958 | Tornado | Tornado | F3 | $250K | — | 1 | 8 | County |
| 24 Feb 2001 | Lightning | Lightning | — | — | — | 1 | — | County |
| 19 Jun 2001 | Heat | Heat | — | — | — | 1 | — | Forecast zone |
| 24 Aug 2003 | Heat | Heat | — | — | — | 1 | — | Forecast zone |
| 23 Jun 2005 | Heat | Heat | — | — | — | 1 | — | Forecast zone |
| 29 Jul 2006 | Heat | Heat | — | — | — | 1 | — | Forecast zone |
| 4 Aug 2007 | Excessive Heat | Heat | — | — | — | 1 | — | Forecast zone |
| 10 Jul 2011 | Excessive Heat | Heat | — | — | — | 1 | — | Forecast zone |
| 16 Jul 2012 | Excessive Heat | Heat | — | — | — | 1 | — | Forecast zone |
| 13 Jul 2016 | Thunderstorm Wind | Wind | 64 mph | — | — | 1 | — | County |
| 18 Apr 2019 | Lightning | Lightning | — | — | — | 1 | — | County |
| 1 May 1983 | Tornado | Tornado | F2 | $2.5M | — | — | 20 | County |
| 18 Jul 1998 | Heat | Heat | — | — | — | — | 10 | Forecast zone |
Ranked by deaths, then injuries, then NCEI's damage estimate. Deaths and injuries are NCEI counts (direct plus indirect); no personal details are recorded here.
Federal disaster declarations
| Declared | Number | Type | Incident | Title | Programs |
|---|---|---|---|---|---|
| 20 Sep 2024 | DR-4819 | Major disaster | Flood | Severe Storms, Tornadoes, Straight-Line Winds, And Floodng | Individual assistance |
| 14 Oct 2022 | DR-4676 | Major disaster | Flood | Severe Storm And Flooding | Individual assistance |
| 26 Mar 2020 | DR-4489 | Major disaster | Biological | Covid-19 Pandemic | Individual assistance, Public assistance |
| 13 Mar 2020 | EM-3435 | Emergency | Biological | Covid-19 | Public assistance |
| 19 Sep 2019 | DR-4461 | Major disaster | Flood | Severe Storms And Flooding | Public assistance |
| 24 Jun 2008 | DR-1771 | Major disaster | Severe Storm | Severe Storms And Flooding | Public assistance |
| 9 Feb 2007 | DR-1681 | Major disaster | Severe Ice Storm | Severe Winter Storm | Public assistance |
| 7 Sep 2005 | EM-3230 | Emergency | Hurricane | Hurricane Katrina Evacuation | Public assistance |
| 21 May 2002 | DR-1416 | Major disaster | Tornado | Severe Storms, Tornadoes And Flooding | Individual assistance |
| 6 May 1996 | DR-1112 | Major disaster | Severe Storm | Severe Storms And Flooding | Individual assistance, Public assistance |
| 30 May 1995 | DR-1053 | Major disaster | Severe Storm | Severe Storms And Flooding | Individual assistance, Public assistance |
| 26 Apr 1994 | DR-1025 | Major disaster | Severe Storm | Severe Storms And Flooding | Individual assistance, Public assistance |
| 9 Jul 1993 | DR-997 | Major disaster | Flood | Severe Storms & Flooding | Individual assistance, Public assistance |
| 7 Oct 1986 | DR-776 | Major disaster | Flood | Severe Storms & Flooding | Individual assistance, Public assistance |
| 6 Jun 1983 | DR-684 | Major disaster | Severe Storm | Severe Storms, Tornadoes & Flooding | Public assistance |
| 30 Apr 1979 | DR-583 | Major disaster | Flood | Severe Storms & Flooding | Individual assistance, Public assistance |
| 26 Apr 1973 | DR-373 | Major disaster | Flood | Severe Storms & Flooding | Individual assistance, Public assistance |
| 30 Aug 1969 | DR-276 | Major disaster | Flood | Heavy Rains & Flooding | Individual assistance, Public assistance |
| 5 Jun 1968 | DR-242 | Major disaster | Tornado | Tornadoes, Severe Storms & Flooding | Individual assistance, Public assistance |
Declarations in which FEMA designated this county, from the OpenFEMA Disaster Declarations Summaries (v2). DR: major disaster; EM: emergency; FM: fire management assistance. Programs show whether individual or public assistance was made available.
Flood insurance claims
| Year of loss | Claims | Paid claims | Amount paid | Average paid |
|---|---|---|---|---|
| 2026 | 3 | 1 | $4,072 | $4,072 |
| 2025 | 14 | 9 | $157,344 | $17,483 |
| 2024 | 114 | 80 | $1,323,190 | $16,540 |
| 2023 | 13 | 9 | $164,363 | $18,263 |
| 2022 | 98 | 73 | $1,727,700 | $23,667 |
| 2021 | 1 | 0 | $0 | — |
| 2020 | 7 | 6 | $54,340 | $9,057 |
| 2019 | 7 | 5 | $101,113 | $20,223 |
| 2018 | 15 | 12 | $57,584 | $4,799 |
| 2017 | 13 | 9 | $65,732 | $7,304 |
| 2016 | 13 | 10 | $79,861 | $7,986 |
| 2015 | 47 | 35 | $311,264 | $8,893 |
| 2014 | 3 | 1 | $10,737 | $10,737 |
| 2013 | 41 | 31 | $337,223 | $10,878 |
| 2012 | 6 | 4 | $6,760 | $1,690 |
| 2011 | 30 | 22 | $121,576 | $5,526 |
| 2010 | 22 | 18 | $67,406 | $3,745 |
| 2009 | 4 | 2 | $16,271 | $8,136 |
| 2008 | 46 | 36 | $240,086 | $6,669 |
| 2007 | 2 | 2 | $10,033 | $5,017 |
| 2006 | 6 | 3 | $7,216 | $2,405 |
| 2005 | 12 | 7 | $26,536 | $3,791 |
| 2004 | 14 | 7 | $28,152 | $4,022 |
| 2003 | 14 | 4 | $22,548 | $5,637 |
| 2002 | 16 | 5 | $22,262 | $4,452 |
OpenFEMA NFIP claims (v3, as of 8 Sep 2026), aggregated by year of loss; amounts are building, contents and increased-cost-of-compliance payments as recorded. Repetitive-loss counts from the NFIP Multiple Loss Properties file (2 Aug 2026); policies in force from the NFIP Residential Penetration Rates file (3 Aug 2026).
National Risk Index
| Hazard (NRI) | Risk rating | Expected annual loss |
|---|---|---|
| Inland flooding | $71,743,379 | |
| Earthquake | $50,808,116 | |
| Heat wave | $15,135,349 | |
| Cold wave | $14,808,417 | |
| Tornado | $12,987,346 | |
| Hail | $5,138,731 | |
| Lightning | $1,587,064 | |
| Ice storm | $1,042,941 | |
| Strong wind | $627,349 | |
| Winter weather | $332,859 | |
| Drought | $313,995 | |
| Landslide | $27,606 | |
| Hurricane | $21,007 | |
| Wildfire | $5,162 |
FEMA National Risk Index, December 2025 release. Ratings are FEMA's relative comparison of counties; expected annual loss is FEMA's modelled estimate of average yearly building, population and agriculture loss. See how to read the NRI.
Hurricane and tropical storm passes
| Storm | Year | Closest approach | Max wind while within 100 mi |
|---|---|---|---|
| Ike | 2008 | 84 mi | 46 mph |
| Unnamed Atlantic storm | 1941 | 70 mi | 40 mph |
| Unnamed Atlantic storm | 1915 | 70 mi | 40 mph |
HURDAT2 best-track positions at tropical-storm strength (34 kt) or more, measured from the county's Census centre point; through the 2025 season. Distance from a track is not the same as the extent of the storm's wind, rain or surge.
ZIP codes with flood claims
- 62203 283
- 62205 196
- 62206 177
- 62239 172
- 62204 87
- 62240 83
- 62201 76
- 62232 62
- 62207 52
- 62220 49
- 62221 40
- 62226 39
- 62269 33
- 62223 22
- 62254 16
- 62264 16
- 62258 15
- 62208 12
- 62289 6
- 62059 5
- 62243 5
ZIP codes whose NFIP claims carry this county's code, with the number of claims. Five or more claims are needed for a ZIP page to be indexed.
Questions and answers
How often does it hail in St. Clair County, IL?
NCEI records 319 hail events in St. Clair County since 1950, in 59 different years; that is about 4.1 recorded events a year. 75 reports were golf-ball size (1.75 in) or larger.
Has St. Clair County had a tornado?
Yes. NCEI records 56 tornadoes in St. Clair County since 1950, 14 of them rated (E)F2 or stronger. Tornado deaths recorded: 12.
When was the last federal disaster declaration for St. Clair County?
20 Sep 2024: Severe Storms, Tornadoes, Straight-Line Winds, And Floodng, a major disaster declaration for flood. The county appears in 19 declarations since 1953.
How many flood insurance claims have been filed in St. Clair County, and how much was paid?
1,469 NFIP claims since 1978, 1,011 of them paid, for $7.8M in total. FEMA publishes these figures redacted and aggregated; individual properties are not identified.
Is St. Clair County in the National Risk Index's high-risk band?
FEMA's National Risk Index (December 2025) rates the county "Relatively High" for overall risk, "Relatively Moderate" for expected annual loss, "Relatively Low" for social vulnerability and "Relatively High" for community resilience. These ratings are FEMA's relative comparison across all US counties.
How does St. Clair County compare with the rest of Illinois?
159.2 recorded events per 100 square miles against 120.2 statewide, and 5.8 NFIP claims per 1,000 residents against 4.2. The comparison table on this page shows each measure beside the state and national figures.
Provenance
Storm events: NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026 (public domain). Declarations: OpenFEMA DisasterDeclarationsSummaries v2, refreshed 1 Oct 2026. Flood claims: OpenFEMA NfipClaims v3 as of 8 Sep 2026; NfipMultipleLossProperties v1 (2 Aug 2026); NfipResidentialPenetrationRates v1 (3 Aug 2026). Risk index: FEMA National Risk Index, December 2025. Hurricane tracks: NHC HURDAT2 through 2025. Population and area: US Census Bureau, 2021 vintage. Built 1 Oct 2026; see the methodology and corrections pages. Hazard hubs: Hail · Tornado · Flood · Wind · Winter.