Enter any address in Iroquois County, Illinois to see its FEMA flood zone
Flood and flash flood events have occurred frequently in Iroquois County over the last 30 years. Recent examples include heavy rain causing flash flooding in August 2023, with rainfall totals exceeding 6 inches in some areas, and scattered thunderstorms producing heavy rain in July 2022.
National Flood Insurance Program (NFIP) claims data shows that properties in Zone A have experienced the most claims, with an average payout of $16,615 and an average water depth of 6.5 feet. Properties in Zone X have also seen claims, with a higher average payout of $21,282, though with a lower average water depth of 2.7 feet. Homeowners in Zone A, as well as those in Zone X and other areas with recorded claims, should pay close attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
11 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Iroquois County, Illinois has recorded 54 flood-related events since 1996 according to NOAA's Storm Events Database, including 25 flash floods and 29 river or area floods. The county has received 9 federal disaster declarations. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1990–2020)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms And Flooding | Severe Storm | Jan 7, 2008 |
| Hurricane Katrina Evacuation | Hurricane | Aug 29, 2005 |
| Severe Storms, Tornadoes And Flooding | Tornado | Apr 21, 2002 |
| Illinois Winter Snow Storms | Snowstorm | Dec 11, 2000 |
| Winter Storm 1/1/99 | Snowstorm | Jan 1, 1999 |
| Severe Storms And Flooding | Severe Storm | Apr 9, 1994 |
| Severe Ice Storm | Severe Ice Storm | Feb 14, 1990 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | Feb 22, 2023 | 0.00K |
| Flash Flood | Aug 5, 2023 | 0.00K |
| Flood | Jul 4, 2022 | 0.00K |
| Flood | Oct 25, 2021 | 0.00K |
| Flash Flood | Oct 24, 2021 | 0.00K |
| Flood | Jul 24, 2021 | 0.00K |
| Flash Flood | Jun 27, 2020 | 0.00K |
| Flash Flood | May 17, 2020 | 0.00K |
| Flood | Jan 11, 2020 | 0.00K |
| Flood | Feb 20, 2018 | 0.00K |
Flood — Feb 22, 2023
Freezing rain developed across portions of northern Illinois during the morning of February 22nd and continued into the early morning of February 23rd with the bulk of the freezing rain falling from mid afternoon through mid evening. Thousands of tree limbs and hundreds of power lines came down due to the weight of the ice and northeast winds gusting to 35 mph. Several trees also came down, i...
Flash Flood — Aug 5, 2023
Very heavy rain fell across portions of east central Illinois on August 5th which resulted in areas of flash flooding. The highest storm total rainfall amounts included 6.50 inches in Paxton and two miles west northwest of Loda; 6.34 inches two miles east of Claytonville; 6.28 inches four miles east northeast of Buckley; 6.00 inches one mile east of Loda; 5.97 inches in Buckley; 5.79 inches on...
Flood — Jul 4, 2022
Scattered thunderstorms moved across central Illinois during the afternoon of July 4th producing scattered wind damage and heavy rain. Isolated thunderstorms moved across parts of northern Illinois during the afternoon of July 4th producing isolated wind damage. Numerous thunderstorms moved across northern Illinois during the late evening of July 4th and the early morning of July 5th producin...
Flood — Oct 25, 2021
High winds produced isolated wind damage and heavy rains produced localized flooding on October 24th and 25th. A large healthy tree limb was blown down in Clarendon Hills in DuPage County. A tree approximately 18 inches in diameter was blown down near the intersection of Washington Street and Hillside Road in Naperville in DuPage County. A large tree limb was blown down in Crystal Lake in Mc...
Flash Flood — Oct 24, 2021
High winds produced isolated wind damage and heavy rains produced localized flooding on October 24th and 25th. A large healthy tree limb was blown down in Clarendon Hills in DuPage County. A tree approximately 18 inches in diameter was blown down near the intersection of Washington Street and Hillside Road in Naperville in DuPage County. A large tree limb was blown down in Crystal Lake in Mc...
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in Iroquois County, Illinois:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in Iroquois County, Illinois that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.