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Flood in Henderson County, Illinois
60 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
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. Storm records through 30 Jun 2026.
NCEI records 60 flood events in Henderson County, Illinois, between 1950 and 2026, spread over 20 years.
May is the busiest month, with 17 of the recorded events. The last 20 years account for 39 events against 21 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.9% of the 6,507 flood events recorded in Illinois; its 15.8 per 100 square miles compares with 11.7 statewide.
Compared with Illinois
| Measure | Henderson County | Illinois | US |
|---|---|---|---|
| Flood events since 1950 | 60 | 6,507 | 183,559 |
| Per 100 square miles | 15.8 | 11.7 | 5.2 |
| Per 10,000 residents | 95.1 | 5.1 | 5.5 |
| Deaths recorded | 0 | 61 | 2,961 |
| Busiest month | May | June | June |
By year
Seasonality
0Feb
2Mar
1Apr
13May
17Jun
14Jul
2Aug
4Sep
2Oct
5Nov
0Dec
0
Recorded events
All 60 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 2 Jul 2024 | Flood | — | — | — | — | — | County |
| 5 Aug 2023 | Flash Flood | — | — | — | — | — | County |
| 27 Apr 2023 | Flood | — | — | — | — | — | County |
| 26 Apr 2023 | Flood | — | — | — | — | — | County |
| 11 Apr 2020 | Flood | — | — | — | — | — | County |
| 8 Oct 2019 | Flood | — | — | — | — | — | County |
| 1 Jun 2019 | Flood | — | — | — | — | — | County |
| 29 May 2019 | Flash Flood | — | — | — | — | — | County |
| 29 May 2019 | Flood | — | — | — | — | — | County |
| 19 May 2019 | Flood | — | — | — | — | — | County |
| 2 May 2019 | Flood | — | — | — | — | — | County |
| 1 May 2019 | Flood | — | — | — | — | — | County |
| 1 May 2019 | Flood | — | — | — | — | — | County |
| 26 Apr 2019 | Flood | — | — | — | — | — | County |
| 1 Apr 2019 | Flood | — | — | — | — | — | County |
| 17 Mar 2019 | Flood | — | — | — | — | — | County |
| 8 Oct 2018 | Flood | — | — | — | — | — | County |
| 9 Sep 2018 | Flood | — | — | — | — | — | County |
| 1 Oct 2016 | Flood | — | — | $100K | — | — | County |
| 26 Jun 2014 | Flood | — | — | — | — | — | County |
| 28 Jun 2013 | Flood | — | — | — | — | — | County |
| 1 Jun 2013 | Flood | — | — | — | — | — | County |
| 29 May 2013 | Flood | — | — | — | — | — | County |
| 18 Apr 2013 | Flood | — | — | — | — | — | County |
| 17 Apr 2013 | Flood | — | $250K | — | — | — | County |
| 14 Jun 2011 | Flash Flood | — | — | — | — | — | County |
| 18 Apr 2011 | Flood | — | $250K | — | — | — | County |
| 2 Oct 2010 | Flood | — | — | — | — | — | County |
| 25 Jul 2010 | Flood | — | $125K | — | — | — | County |
| 23 Jun 2010 | Flash Flood | — | — | — | — | — | County |
| 22 Jun 2010 | Flood | — | $250K | — | — | — | County |
| 12 May 2010 | Flash Flood | — | — | — | — | — | County |
| 9 Aug 2009 | Flash Flood | — | — | — | — | — | County |
| 30 Apr 2009 | Flood | — | $250 | — | — | — | County |
| 1 Jun 2008 | Flood | — | — | — | — | — | County |
| 1 May 2008 | Flood | — | — | — | — | — | County |
| 1 Apr 2008 | Flood | — | — | — | — | — | County |
| 22 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 22 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 1 Jun 2004 | Flood | — | — | — | — | — | Forecast zone |
| 26 May 2004 | Flood | — | — | — | — | — | Forecast zone |
| 21 May 2003 | Flood | — | $1.0M | — | — | — | Forecast zone |
| 4 May 2003 | Flash Flood | — | $500K | — | — | — | County |
| 13 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 12 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 12 May 2002 | Flash Flood | — | — | — | — | — | County |
| 12 May 2002 | Flash Flood | — | — | — | — | — | County |
| 12 May 2002 | Flash Flood | — | — | — | — | — | County |
| 11 May 2002 | Flash Flood | — | — | — | — | — | County |
| 3 Aug 2001 | Flash Flood | — | — | — | — | — | County |
| 3 Aug 2001 | Flash Flood | — | — | — | — | — | County |
| 1 May 2001 | Flood | — | — | — | — | — | Forecast zone |
| 15 Apr 2001 | Flood | — | — | — | — | — | Forecast zone |
| 5 Apr 2001 | Flood | — | — | — | — | — | County |
| 24 Feb 2001 | Flood | — | — | — | — | — | County |
| 22 Sep 2000 | Flood | — | — | — | — | — | County |
| 2 Jun 2000 | Flood | — | — | — | — | — | Forecast zone |
| 17 Oct 1998 | Flash Flood | — | — | — | — | — | County |
| 8 Apr 1997 | Flood | — | — | — | — | — | Forecast zone |
| 20 Feb 1997 | Flash Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Henderson County had?
60 events in the NCEI Storm Events record between 1950 and 2026. Reporting of floods and flash floods became far more complete after 1996, so early decades undercount.
When was the last recorded flood event in Henderson County?
2 Jul 2024 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Henderson County?
The flood of 21 May 2003, with property damage estimated by NCEI at $1.0M.
How does Henderson County compare with Illinois for flood?
15.8 events per 100 square miles against 11.7 statewide; the county holds 60 of the state's 6,507 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Flood hub and the county page.