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Flood in Will County, Illinois
160 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 160 flood events in Will County, Illinois, between 1950 and 2026, spread over 30 years.
June is the busiest month, with 31 of the recorded events. The last 20 years account for 124 events against 36 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 2.5% of the 6,507 flood events recorded in Illinois; its 19.1 per 100 square miles compares with 11.7 statewide.
NCEI attributes 3 deaths in the county to floods and flash floods.
Compared with Illinois
| Measure | Will County | Illinois | US |
|---|---|---|---|
| Flood events since 1950 | 160 | 6,507 | 183,559 |
| Per 100 square miles | 19.1 | 11.7 | 5.2 |
| Per 10,000 residents | 2.3 | 5.1 | 5.5 |
| Deaths recorded | 3 | 61 | 2,961 |
| Busiest month | June | June | June |
By year
Seasonality
8Feb
12Mar
11Apr
14May
30Jun
31Jul
15Aug
24Sep
9Oct
6Nov
0Dec
0
Recorded events
All 160 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 |
|---|---|---|---|---|---|---|---|
| 24 Jun 2026 | Flood | — | — | — | — | — | County |
| 11 Jun 2026 | Flood | — | — | — | — | — | County |
| 4 Apr 2026 | Flood | — | — | — | — | — | County |
| 8 Jan 2026 | Flood | — | — | — | — | — | County |
| 18 Aug 2025 | Flash Flood | — | — | — | — | — | County |
| 18 Aug 2025 | Flash Flood | — | $1.0M | — | — | — | County |
| 18 Aug 2025 | Flash Flood | — | $250K | — | — | — | County |
| 17 Aug 2025 | Flash Flood | — | $1.0M | — | — | — | County |
| 12 Aug 2025 | Flash Flood | — | — | — | — | — | County |
| 25 Jul 2025 | Flood | — | — | — | — | — | County |
| 18 Jun 2025 | Flood | — | — | — | — | — | County |
| 18 Jun 2025 | Flood | — | — | — | — | — | County |
| 2 Apr 2025 | Flood | — | — | — | — | — | County |
| 7 May 2024 | Flood | — | — | — | — | — | County |
| 29 Apr 2024 | Flood | — | — | — | — | — | County |
| 14 Mar 2024 | Flood | — | — | — | — | — | County |
| 14 Mar 2024 | Flood | — | — | — | — | — | County |
| 25 Jan 2024 | Flash Flood | — | $250K | — | — | — | County |
| 15 Jan 2024 | Flood | — | — | — | — | — | County |
| 2 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 31 Mar 2023 | Flood | — | — | — | — | — | County |
| 3 May 2022 | Flood | — | — | — | — | — | County |
| 22 Feb 2022 | Flash Flood | — | — | — | — | — | County |
| 22 Feb 2022 | Flood | — | — | — | — | — | County |
| 17 Feb 2022 | Flash Flood | — | — | — | — | — | County |
| 24 Oct 2021 | Flood | — | — | — | — | — | County |
| 18 Aug 2021 | Flood | — | — | — | — | — | County |
| 30 Jun 2021 | Flood | — | — | — | — | — | County |
| 26 Jun 2021 | Flash Flood | — | — | — | — | — | County |
| 26 Jun 2021 | Flash Flood | — | — | — | — | — | County |
| 19 Jul 2020 | Flood | — | — | — | — | — | County |
| 21 Jun 2020 | Flood | — | — | — | — | — | County |
| 23 May 2020 | Flash Flood | — | — | — | — | — | County |
| 17 May 2020 | Flash Flood | — | — | — | — | — | County |
| 17 May 2020 | Flash Flood | — | — | — | — | — | County |
| 17 May 2020 | Flash Flood | — | — | — | — | — | County |
| 17 May 2020 | Flood | — | — | — | — | — | County |
| 17 May 2020 | Flood | — | — | — | — | — | County |
| 17 May 2020 | Flash Flood | — | — | — | — | — | County |
| 17 May 2020 | Flash Flood | — | — | — | — | — | County |
| 17 May 2020 | Flood | — | — | — | — | — | County |
| 17 May 2020 | Flood | — | — | — | — | — | County |
| 15 May 2020 | Flash Flood | — | — | — | — | — | County |
| 30 Apr 2020 | Flood | — | — | — | — | — | County |
| 29 Apr 2020 | Flood | — | — | — | — | — | County |
| 26 Oct 2019 | Flood | — | — | — | — | — | County |
| 28 Sep 2019 | Flood | — | — | — | — | — | County |
| 28 Sep 2019 | Flood | — | — | — | — | — | County |
| 27 Sep 2019 | Flash Flood | — | — | — | — | — | County |
| 27 Sep 2019 | Flash Flood | — | — | — | — | — | County |
| 30 Jun 2019 | Flood | — | — | — | — | — | County |
| 26 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 27 May 2019 | Flood | — | — | — | — | — | County |
| 27 May 2019 | Flood | — | — | — | — | — | County |
| 1 May 2019 | Flood | — | — | — | — | — | County |
| 1 May 2019 | Flood | — | — | — | — | — | County |
| 30 Apr 2019 | Flood | — | — | — | — | — | County |
| 6 Feb 2019 | Flash Flood | — | — | — | — | — | County |
| 20 Feb 2018 | Flood | — | — | — | 1 | — | County |
| 19 Feb 2018 | Flash Flood | — | — | — | — | — | County |
| 14 Oct 2017 | Flood | — | — | — | — | — | County |
| 23 Jul 2017 | Flood | — | — | — | — | — | County |
| 23 Jul 2017 | Flood | — | — | — | — | — | County |
| 28 Feb 2017 | Flood | — | — | — | — | — | County |
| 28 Feb 2017 | Flood | — | — | — | — | — | County |
| 28 Aug 2016 | Flash Flood | — | $1K | — | — | — | County |
| 22 Jun 2015 | Flash Flood | — | — | — | — | — | County |
| 15 Jun 2015 | Flash Flood | — | — | — | — | — | County |
| 10 Jun 2015 | Flood | — | — | — | — | — | County |
| 7 Jun 2015 | Flood | — | — | — | — | — | County |
| 7 Jun 2015 | Flood | — | — | — | — | — | County |
| 21 Jun 2014 | Flood | — | — | — | — | — | County |
| 21 Jun 2014 | Flash Flood | — | — | — | — | — | County |
| 28 May 2013 | Flood | — | — | — | — | — | County |
| 18 Apr 2013 | Flash Flood | — | — | — | — | — | County |
| 10 Mar 2013 | Flood | — | — | — | — | — | County |
| 7 May 2012 | Flash Flood | — | — | — | — | — | County |
| 7 May 2012 | Flash Flood | — | — | — | — | — | County |
| 9 Jun 2011 | Flood | — | — | — | — | — | County |
| 9 Jun 2011 | Flood | — | — | — | — | — | County |
| 9 Jun 2011 | Flood | — | — | — | — | — | County |
| 9 Jun 2011 | Flash Flood | — | — | — | — | — | County |
| 28 May 2011 | Flash Flood | — | — | — | — | — | County |
| 28 May 2011 | Flood | — | — | — | — | — | County |
| 3 Aug 2010 | Flash Flood | — | — | — | — | — | County |
| 3 Aug 2010 | Flash Flood | — | $1.0M | — | — | — | County |
| 25 Jul 2010 | Flood | — | — | — | — | — | County |
| 24 Jul 2010 | Flood | — | — | — | — | — | County |
| 23 Jun 2010 | Flash Flood | — | — | — | — | — | County |
| 23 Jun 2010 | Flood | — | — | — | — | — | County |
| 23 Jun 2010 | Flood | — | — | — | — | — | County |
| 16 Jun 2009 | Flash Flood | — | — | — | — | — | County |
| 26 May 2009 | Flood | — | — | — | — | — | County |
| 8 Mar 2009 | Flood | — | — | — | — | — | County |
| 8 Mar 2009 | Flood | — | — | — | — | — | County |
| 8 Mar 2009 | Flood | — | — | — | — | — | County |
| 8 Mar 2009 | Flood | — | — | — | — | — | County |
| 26 Feb 2009 | Flood | — | — | — | — | — | County |
| 14 Sep 2008 | Flood | — | — | — | — | — | County |
| 14 Sep 2008 | Flash Flood | — | $500K | — | — | — | County |
| 14 Sep 2008 | Flash Flood | — | $1.0M | — | — | — | County |
| 14 Sep 2008 | Flood | — | — | — | — | — | County |
| 4 Aug 2008 | Flood | — | — | — | — | — | County |
| 4 Jun 2008 | Flash Flood | — | — | — | — | — | County |
| 17 Feb 2008 | Flood | — | — | — | — | — | County |
| 22 Jan 2008 | Flash Flood | — | $100K | — | — | — | County |
| 8 Jan 2008 | Flood | — | — | — | — | — | County |
| 8 Jan 2008 | Flash Flood | — | — | — | — | — | County |
| 8 Jan 2008 | Flood | — | — | — | — | — | County |
| 23 Aug 2007 | Flood | — | — | — | — | — | County |
| 23 Aug 2007 | Flood | — | — | — | — | — | County |
| 23 Aug 2007 | Flash Flood | — | — | — | — | — | County |
| 23 Aug 2007 | Flood | — | $25K | — | — | — | County |
| 23 Aug 2007 | Flood | — | — | — | — | — | County |
| 23 Aug 2007 | Flood | — | — | — | — | — | County |
| 23 Aug 2007 | Flood | — | — | — | — | — | County |
| 23 Aug 2007 | Flash Flood | — | $15K | — | — | — | County |
| 22 Aug 2007 | Flood | — | — | — | — | — | County |
| 5 Aug 2007 | Flood | — | — | — | — | — | County |
| 18 Jul 2007 | Flood | — | — | — | — | — | County |
| 26 Jun 2007 | Flood | — | — | — | — | — | County |
| 26 May 2007 | Flood | — | — | — | — | — | County |
| 26 May 2007 | Flood | — | — | — | — | — | County |
| 1 Mar 2007 | Flood | — | — | — | — | — | County |
| 2 Oct 2006 | Flash Flood | — | $10K | — | — | — | County |
| 2 Oct 2006 | Flash Flood | — | $50K | — | — | — | County |
| 13 Sep 2006 | Flood | — | — | — | — | — | County |
| 10 Aug 2006 | Flood | — | — | — | — | — | County |
| 10 Aug 2006 | Flood | — | — | — | — | — | County |
| 27 Jul 2006 | Flash Flood | — | $3.0M | — | — | — | County |
| 27 Jul 2006 | Flood | — | — | — | — | — | County |
| 27 Jul 2006 | Flood | — | — | — | — | — | County |
| 11 Jul 2006 | Flood | — | — | — | — | — | County |
| 16 Apr 2006 | Flood | — | — | — | — | — | County |
| 4 Jun 2005 | Flash Flood | — | — | — | — | — | County |
| 30 Mar 2005 | Flood | — | — | — | — | — | Forecast zone |
| 30 Mar 2005 | Flood | — | — | — | — | — | Forecast zone |
| 14 Feb 2005 | Flood | — | — | — | — | — | Forecast zone |
| 13 Jan 2005 | Flood | — | — | — | — | — | Forecast zone |
| 11 Jun 2004 | Flash Flood | — | — | — | — | — | County |
| 10 Jun 2004 | Flash Flood | — | — | — | — | — | County |
| 30 May 2004 | Flash Flood | — | — | — | — | — | County |
| 30 May 2004 | Flash Flood | — | — | — | — | — | County |
| 30 May 2004 | Flash Flood | — | — | — | — | — | County |
| 13 May 2004 | Flash Flood | — | — | — | — | — | County |
| 20 Apr 2004 | Flash Flood | — | — | — | — | — | County |
| 20 Apr 2004 | Flash Flood | — | — | — | — | — | County |
| 20 Apr 2004 | Flash Flood | — | — | — | — | — | County |
| 20 Apr 2004 | Flash Flood | — | — | — | — | — | County |
| 20 Apr 2004 | Flash Flood | — | — | — | — | — | County |
| 3 Aug 2003 | Flash Flood | — | $500K | — | — | — | County |
| 27 Jul 2003 | Flash Flood | — | $14M | — | — | — | County |
| 13 Oct 2001 | Flash Flood | — | — | — | — | — | County |
| 10 Jul 2000 | Flash Flood | — | — | — | — | — | County |
| 22 Jun 1999 | Flash Flood | — | — | — | — | — | County |
| 27 Apr 1999 | Flood | — | — | — | — | — | County |
| 3 Aug 1998 | Flood | — | — | — | — | — | County |
| 6 May 1998 | Flash Flood | — | — | — | — | — | County |
| 20 Feb 1997 | Flood | — | — | — | — | — | Forecast zone |
| 17 Jul 1996 | Flash Flood | — | — | — | 2 | — | County |
Questions and answers
How many flood events has Will County had?
160 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 Will County?
24 Jun 2026 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Will County?
The flash flood of 27 Jul 2003, with property damage estimated by NCEI at $14M.
How does Will County compare with Illinois for flood?
19.1 events per 100 square miles against 11.7 statewide; the county holds 160 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.