Marysville, Ohio: natural disaster risk
How exposed Marysville is to floods, storms and other hazards, from FEMA and NOAA records for Union County.
Marysville is a city of 27,518 people in Union County, Ohio. FEMA's National Risk Index rates Union County very low for natural hazards overall, lower than most of the US. The costliest hazards there are inland flooding, tornado and hail, with about $19 million in expected losses a year across the county. The weather service has logged 274 storm reports in the county since 1963, including 12 tornadoes and 46 floods. About 0.3% of homes in the county carry federal flood insurance.
Risk figures are for Union County. FEMA National Risk Index December 2025; NOAA Storm Events; US Census Bureau ACS 2020 to 2024. Updated November 6, 2026.
Top risks in Marysville
Full Union 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 about the roof age and any impact-rated shingles.
- Check your home policy for a separate wind and hail deductible.
All hazards
| Hazard | Rating | A year |
|---|---|---|
| Inland flooding | $13M | |
| Tornado | $2M | |
| Hail | $722K | |
| Heat wave | $647K | |
| Strong wind | $588K | |
| Ice storm | $524K | |
| Cold wave | $467K | |
| Earthquake | $459K | |
| Lightning | $255K | |
| Winter weather | $155K | |
| Drought | $78K | |
| Hurricane | $14K |
Homes in Marysville
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 Union County
Common questions about Marysville
Is Marysville safe from natural disasters?
Marysville is in Union County, which FEMA's National Risk Index rates very low overall, lower than most of the US. The biggest hazards are inland flooding, tornado, hail. No place is free of risk, so check the flood map and insurance for any home you consider.
What natural disasters happen in Marysville?
By expected yearly losses in Union County, the top hazards are inland flooding (Low), tornado (Low), hail (Low). Union County has been part of 11 federal disaster or emergency declarations for natural events.
Does Marysville get tornadoes?
Yes. NOAA records list 12 tornadoes in Union County since 1950; the strongest was an F3 tornado on November 10, 2002 near Raymond. FEMA rates tornado risk in the county low.
Do I need flood insurance in Marysville?
Standard home insurance does not cover floods. In Union County, about 0.3% of homes have federal flood insurance, and FEMA rates inland flooding risk low. Check the FEMA flood map for your address and get a quote even outside a high-risk zone.