St. Charles, Missouri: natural disaster risk
How exposed St. Charles is to floods, storms and other hazards, from FEMA and NOAA records for St. Charles County.
St. Charles is a city of 71,508 people in St. Charles County, Missouri. FEMA's National Risk Index rates St. Charles County relatively moderate for natural hazards overall, about average for the US. The costliest hazards there are inland flooding, tornado and earthquake, with about $215 million in expected losses a year across the county. The weather service has logged 821 storm reports in the county since 1954, including 43 tornadoes and 52 floods. About 0.8% of homes in the county carry federal flood insurance.
Risk figures are for St. Charles County. FEMA National Risk Index December 2025; NOAA Storm Events; US Census Bureau ACS 2020 to 2024. Updated November 6, 2026.
Top risks in St. Charles
Full St. Charles 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.
- 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.
- Ask whether an older house is bolted to its foundation.
- Consider separate earthquake insurance where risk is high.
All hazards
| Hazard | Rating | A year |
|---|---|---|
| Inland flooding | $116M | |
| Tornado | $28M | |
| Earthquake | $22M | |
| Cold wave | $15M | |
| Heat wave | $12M | |
| Strong wind | $10M | |
| Hail | $9M | |
| Lightning | $2M | |
| Winter weather | $658K | |
| Ice storm | $416K | |
| Landslide | $144K | |
| Wildfire | $135K |
Homes in St. Charles
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 St. Charles County
More cities in St. Charles County
Common questions about St. Charles
Is St. Charles safe from natural disasters?
St. Charles is in St. Charles County, which FEMA's National Risk Index rates relatively moderate overall, about average for the US. The biggest hazards are inland flooding, tornado, earthquake. No place is free of risk, so check the flood map and insurance for any home you consider.
What natural disasters happen in St. Charles?
By expected yearly losses in St. Charles County, the top hazards are inland flooding (High), tornado (High), earthquake (Moderate). St. Charles County has been part of 26 federal disaster or emergency declarations for natural events.
Does St. Charles get tornadoes?
Yes. NOAA records list 43 tornadoes in St. Charles County since 1950; the strongest was an EF3 tornado on December 10, 2021 near Femme Osage. FEMA rates tornado risk in the county high.
Do I need flood insurance in St. Charles?
Standard home insurance does not cover floods. In St. Charles County, about 0.8% 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.