Iowa City, Iowa: natural disaster risk
How exposed Iowa City is to floods, storms and other hazards, from FEMA and NOAA records for Johnson County.
Iowa City is a city of 75,752 people in Johnson County, Iowa. FEMA's National Risk Index rates Johnson County relatively moderate for natural hazards overall, about average for the US. The costliest hazards there are tornado, inland flooding and strong wind, with about $96.3 million in expected losses a year across the county. The weather service has logged 642 storm reports in the county since 1958, including 46 tornadoes and 67 floods. About 0.7% of homes in the county carry federal flood insurance.
Risk figures are for Johnson County. FEMA National Risk Index December 2025; NOAA Storm Events; US Census Bureau ACS 2020 to 2024. Updated November 6, 2026.
Top risks in Iowa City
Full Johnson County report ›- 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.
- 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.
- Secure outdoor furniture and trash bins before storms.
- Have trees near the house checked.
All hazards
| Hazard | Rating | A year |
|---|---|---|
| Tornado | $36M | |
| Inland flooding | $27M | |
| Strong wind | $10M | |
| Cold wave | $10M | |
| Hail | $4M | |
| Heat wave | $4M | |
| Drought | $1M | |
| Lightning | $830K | |
| Winter weather | $492K | |
| Ice storm | $428K | |
| Earthquake | $294K | |
| Wildfire | $164K |
Homes in Iowa City
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 Johnson County
Common questions about Iowa City
Is Iowa City safe from natural disasters?
Iowa City is in Johnson County, which FEMA's National Risk Index rates relatively moderate overall, about average for the US. The biggest hazards are tornado, inland flooding, strong wind. No place is free of risk, so check the flood map and insurance for any home you consider.
What natural disasters happen in Iowa City?
By expected yearly losses in Johnson County, the top hazards are tornado (High), inland flooding (Moderate), strong wind (Very High). Johnson County has been part of 22 federal disaster or emergency declarations for natural events.
Does Iowa City get tornadoes?
Yes. NOAA records list 46 tornadoes in Johnson County since 1950; the strongest was an F3 tornado on May 15, 1998 near Hills. FEMA rates tornado risk in the county high.
Do I need flood insurance in Iowa City?
Standard home insurance does not cover floods. In Johnson County, about 0.7% of homes have federal flood insurance, and FEMA rates inland flooding risk moderate. Check the FEMA flood map for your address and get a quote even outside a high-risk zone.