Illinois, 2021
The year's recorded storm events, federal disaster declarations and flood insurance claims.
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.
Events by hazard
Includes events recorded by forecast zone. The state's yearly total for 2021 was 1,615 against 1,752 in 2020.
Counties with the most recorded events
Notable events
| Date | County | Event type | Magnitude | Property damage | Deaths | Injuries |
|---|---|---|---|---|---|---|
| 10 Dec 2021 | Madison | Tornado | EF3 | $5,000,000 | 6 | 1 |
| 7 Jul 2021 | Logan | Heavy Rain | — | — | 4 | 1 |
| 11 Aug 2021 | Winnebago | Thunderstorm Wind | 69 mph | — | 1 | 2 |
| 15 Feb 2021 | Forecast zone | Winter Storm | — | — | 1 | 1 |
| 16 Jul 2021 | Jefferson | Flood | — | $30,000 | 1 | — |
| 3 Feb 2021 | Forecast zone | Cold/Wind Chill | — | — | 1 | — |
| 27 Jan 2021 | Cumberland | Winter Weather | — | — | 1 | — |
| 18 Jan 2021 | Rock Island | Cold/Wind Chill | — | — | 1 | — |
| 20 Jan 2021 | Peoria | Cold/Wind Chill | — | — | 1 | — |
| 28 Jul 2021 | Will | Lightning | — | — | 1 | — |
| 20 Jun 2021 | DuPage | Tornado | EF3 | — | — | 11 |
| 12 Aug 2021 | Ford | Flash Flood | — | $12,000,000 | — | — |
| 25 Jun 2021 | McLean | Flash Flood | — | $11,800,000 | — | — |
| 26 Jun 2021 | Cook | Thunderstorm Wind | 63 mph | — | — | 1 |
| 28 May 2021 | Forecast zone | Strong Wind | 49 mph | — | — | 1 |
| 27 Mar 2021 | Madison | Thunderstorm Wind | 75 mph | — | — | 1 |
| 10 Dec 2021 | Shelby | Tornado | EF2 | — | — | 1 |
| 24 Oct 2021 | Randolph | Tornado | EF2 | $3,040,000 | — | — |
| 12 Jul 2021 | LaSalle | Flash Flood | — | $1,200,000 | — | — |
| 26 Jun 2021 | Logan | Flash Flood | — | $300,000 | — | — |
| 9 Jul 2021 | Brown | Thunderstorm Wind | 81 mph | $300,000 | — | — |
| 12 Jul 2021 | Grundy | Flash Flood | — | $300,000 | — | — |
| 18 Jun 2021 | Knox | Tornado | EF1 | $150,000 | — | — |
| 26 Jun 2021 | McLean | Flash Flood | — | $200,000 | — | — |
| 18 Jun 2021 | Fulton | Thunderstorm Wind | 81 mph | $150,000 | — | — |
| 26 Jun 2021 | Sangamon | Thunderstorm Wind | 81 mph | $110,000 | — | — |
| 19 Jun 2021 | Edgar | Thunderstorm Wind | 60 mph | $110,000 | — | — |
| 18 Jun 2021 | Fulton | Thunderstorm Wind | 81 mph | $100,000 | — | — |
| 9 Jul 2021 | Brown | Hail | 2.75 in | $100,000 | — | — |
| 11 Oct 2021 | Greene | Tornado | EF2 | $100,000 | — | — |
| 18 Jun 2021 | Fulton | Thunderstorm Wind | 81 mph | $90,000 | — | — |
| 5 Dec 2021 | Franklin | Tornado | EF1 | $80,000 | — | — |
| 18 Jun 2021 | Knox | Thunderstorm Wind | 81 mph | $75,000 | — | — |
| 7 Apr 2021 | Sangamon | Thunderstorm Wind | 60 mph | $70,000 | — | — |
| 18 Jun 2021 | Fulton | Thunderstorm Wind | 81 mph | $70,000 | — | — |
| 19 Jun 2021 | Douglas | Thunderstorm Wind | 60 mph | $65,000 | — | — |
| 18 Jun 2021 | Knox | Thunderstorm Wind | 81 mph | $60,000 | — | — |
| 18 Jun 2021 | Fulton | Thunderstorm Wind | 81 mph | $60,000 | — | — |
| 18 Jun 2021 | Fulton | Thunderstorm Wind | 81 mph | $60,000 | — | — |
| 18 Jun 2021 | Fulton | Thunderstorm Wind | 81 mph | $60,000 | — | — |
Up to 40 events with deaths, injuries, damage of $50,000 or more, or a tornado rating, ranked by deaths, injuries and damage.
Federal disaster declarations in 2021
| Declared | Number | Type | Incident | Title | Counties |
|---|---|---|---|---|---|
| 13 Dec 2021 | EM-3577 | Emergency | Tornado | Severe Storms, Straight-Line Winds, And Tornadoes | 14 |
Flood insurance claims with a 2021 date of loss
135 NFIP claims, 84 of them paid, for $1,381,941.
Sources: NOAA NCEI Storm Events through 30 Jun 2026; OpenFEMA DisasterDeclarationsSummaries v2 (29 Sep 2026); OpenFEMA NfipClaims v3 (8 Sep 2026). Built 30 Sep 2026.