Enter any address in DuPage County, Illinois to see its FEMA flood zone
Flash flooding from summer thunderstorms dominates flood events in DuPage County. Over the past 30 years, NOAA Storm Events data shows 81 flood events and 63 flash flood events, resulting in 2 fatalities. Recent examples include widespread flash flooding from torrential rainfall on July 25, 2025, and a series of thunderstorms causing heavy rain and flooding on August 17, 2025, across the Chicago metro area, impacting surrounding suburbs.
FEMA National Flood Insurance Program (NFIP) claims data indicates that properties in Zone A, which have a higher flood risk, have experienced the most claims, with an average payout of $18,015 and an average water depth of 3.9 feet. Properties in Zone X (average payout $14,850, 4.2 ft water depth) and Zone X_SHADED (average payout $13,803, 1.5 ft water depth) also show significant claim activity. Homeowners in these zones, as well as those in Zone X_UNSHADED with an average payout of $8,888 and 0.4 ft water depth, should pay close attention to their flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
49 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
DuPage County, Illinois has recorded 144 flood-related events since 1996 according to NOAA's Storm Events Database, including 63 flash floods and 81 river or area floods. The county has received 16 federal disaster declarations, 4 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1967–2020)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms, Straight-line Winds, And Flooding | Flood | Apr 16, 2013 |
| Severe Winter Storm And Snowstorm | Snowstorm | Jan 31, 2011 |
| Severe Storms And Flooding | Severe Storm | Jul 19, 2010 |
| Severe Storms And Flooding | Severe Storm | Sep 13, 2008 |
| Hurricane Katrina Evacuation | Hurricane | Aug 29, 2005 |
| Illinois Winter Snow Storms | Snowstorm | Dec 11, 2000 |
| Winter Storm 1/1/99 | Snowstorm | Jan 1, 1999 |
| Severe Storms And Flooding | Severe Storm | Jul 17, 1996 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | Jan 31, 2025 | 0.00K |
| Flash Flood | Jul 27, 2025 | 2.00K |
| Flood | Jul 27, 2025 | 0.00K |
| Flash Flood | Jul 25, 2025 | 20.00K |
| Flood | Jul 25, 2025 | 0.00K |
| Flood | Jul 24, 2025 | 0.00K |
| Flood | Jun 18, 2025 | 0.00K |
| Flash Flood | Aug 18, 2025 | 0.00K |
| Flash Flood | Aug 17, 2025 | 0.00K |
| Flood | Aug 12, 2025 | 0.00K |
Flood — Jan 31, 2025
Persistent moderate to heavy rain during the morning of the 31st resulted in a few instances of localized flooding, mainly around the interior Chicago metro area. Despite rain reports largely below 1.5, NWS Chicago recorded a 12 frost depth in Romeoville on the morning of the 31st, which made the area more susceptible to flooding.
Flash Flood — Jul 27, 2025
Scattered thunderstorms moved across parts of northeast Illinois during the afternoon of July 27th producing very heavy rain and localized flash flooding in Elmhurst.
Flood — Jul 27, 2025
Scattered thunderstorms moved across parts of northeast Illinois during the afternoon of July 27th producing very heavy rain and localized flash flooding in Elmhurst.
Flash Flood — Jul 25, 2025
Isolated thunderstorms produced funnel clouds across central Illinois during the late morning of July 25th. A narrow line of thunderstorms developed over southeast DuPage and central Cook Counties during the late morning of July 25th and continued into the early afternoon producing torrential rainfall and widespread flash flooding. Scattered thunderstorms moved across portions of northern Ill...
Flood — Jul 25, 2025
Isolated thunderstorms produced funnel clouds across central Illinois during the late morning of July 25th. A narrow line of thunderstorms developed over southeast DuPage and central Cook Counties during the late morning of July 25th and continued into the early afternoon producing torrential rainfall and widespread flash flooding. Scattered thunderstorms moved across portions of northern Ill...
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 DuPage 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 DuPage 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.