Downers Grove, Illinois: natural disaster risk
How exposed Downers Grove is to floods, storms and other hazards, from FEMA and NOAA records for DuPage County.
Downers Grove is a city of 50,054 people in DuPage County, Illinois. FEMA's National Risk Index rates DuPage County relatively high for natural hazards overall, higher than most of the US. The costliest hazards there are inland flooding, cold wave and tornado, with about $366 million in expected losses a year across the county. The weather service has logged 1,084 storm reports in the county since 1955, including 51 tornadoes and 167 floods. About 0.6% of homes in the county carry federal flood insurance.
Risk figures are for DuPage County. FEMA National Risk Index December 2025; NOAA Storm Events; US Census Bureau ACS 2020 to 2024. Updated November 6, 2026.
Top risks in Downers Grove
Full DuPage County report ›- Check the FEMA flood map for your address, and ask the seller or landlord about past flooding.
- Price a flood policy now. Most new federal policies take 30 days to start.
- Insulate pipes in outside walls, crawl spaces and garages.
- Know how to shut off the main water valve.
- Pick a shelter spot: a basement, or an inside room on the lowest floor with no windows.
- Turn on emergency alerts on your phone and keep a weather radio.
All hazards
| Hazard | Rating | A year |
|---|---|---|
| Inland flooding | $195M | |
| Cold wave | $72M | |
| Tornado | $67M | |
| Earthquake | $11M | |
| Strong wind | $11M | |
| Heat wave | $6M | |
| Lightning | $3M | |
| Winter weather | $452K | |
| Hail | $382K | |
| Ice storm | $339K | |
| Wildfire | $22K | |
| Hurricane | $12K |
Homes in Downers Grove
Older homes and mobile homes usually take more damage in storms, floods and earthquakes. Ask about roof age, flood history and retrofits before you buy or rent.
Strongest tornadoes in DuPage County
More cities in DuPage County
Common questions about Downers Grove
Is Downers Grove safe from natural disasters?
Downers Grove is in DuPage County, which FEMA's National Risk Index rates relatively high overall, higher than most of the US. The biggest hazards are inland flooding, cold wave, tornado. No place is free of risk, so check the flood map and insurance for any home you consider.
What natural disasters happen in Downers Grove?
By expected yearly losses in DuPage County, the top hazards are inland flooding (High), cold wave (Very High), tornado (Very High). DuPage County has been part of 14 federal disaster or emergency declarations for natural events.
Does Downers Grove get tornadoes?
Yes. NOAA records list 51 tornadoes in DuPage County since 1950; the strongest was an F4 tornado on June 13, 1976. FEMA rates tornado risk in the county very high.
Do I need flood insurance in Downers Grove?
Standard home insurance does not cover floods. In DuPage County, about 0.6% of homes have federal flood insurance, and FEMA rates inland flooding risk high. Check the FEMA flood map for your address and get a quote even outside a high-risk zone.