Olathe, Kansas: natural disaster risk
How exposed Olathe is to floods, storms and other hazards, from FEMA and NOAA records for Johnson County.
Olathe is a city of 145,057 people in Johnson County, Kansas. FEMA's National Risk Index rates Johnson County relatively high for natural hazards overall, higher than most of the US. The costliest hazards there are inland flooding, tornado and cold wave, with about $257 million in expected losses a year across the county. The weather service has logged 1,392 storm reports in the county since 1952, including 45 tornadoes and 99 floods. About 0.3% 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 Olathe
Full Johnson 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.
- Insulate pipes in outside walls, crawl spaces and garages.
- Know how to shut off the main water valve.
All hazards
| Hazard | Rating | A year |
|---|---|---|
| Inland flooding | $110M | |
| Tornado | $55M | |
| Cold wave | $31M | |
| Heat wave | $27M | |
| Hail | $15M | |
| Winter weather | $6M | |
| Ice storm | $5M | |
| Lightning | $5M | |
| Earthquake | $2M | |
| Strong wind | $758K | |
| Wildfire | $138K | |
| Drought | $18K |
Homes in Olathe
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
More cities in Johnson County
Common questions about Olathe
Is Olathe safe from natural disasters?
Olathe is in Johnson County, which FEMA's National Risk Index rates relatively high overall, higher than most of the US. The biggest hazards are inland flooding, tornado, cold wave. No place is free of risk, so check the flood map and insurance for any home you consider.
What natural disasters happen in Olathe?
By expected yearly losses in Johnson County, the top hazards are inland flooding (High), tornado (Very High), cold wave (High). Johnson County has been part of 10 federal disaster or emergency declarations for natural events.
Does Olathe get tornadoes?
Yes. NOAA records list 45 tornadoes in Johnson County since 1950; the strongest was an F4 tornado on May 22, 1952. FEMA rates tornado risk in the county very high.
Do I need flood insurance in Olathe?
Standard home insurance does not cover floods. In Johnson County, about 0.3% 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.