Boulder, Colorado: natural disaster risk
How exposed Boulder is to floods, storms and other hazards, from FEMA and NOAA records for Boulder County.
Boulder is a city of 106,433 people in Boulder County, Colorado. FEMA's National Risk Index rates Boulder County relatively moderate for natural hazards overall, about average for the US. The costliest hazards there are inland flooding, wildfire and tornado, with about $125 million in expected losses a year across the county. The weather service has logged 514 storm reports in the county since 1953, including 11 tornadoes and 36 floods. About 2.3% of homes in the county carry federal flood insurance.
Risk figures are for Boulder County. FEMA National Risk Index December 2025; NOAA Storm Events; US Census Bureau ACS 2020 to 2024. Updated November 6, 2026.
Top risks in Boulder
Full Boulder 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.
- Clear dry plants and debris within 5 feet of the house.
- Get home insurance quotes early; availability varies by area.
- 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 | $69M | |
| Wildfire | $16M | |
| Tornado | $12M | |
| Hail | $10M | |
| Lightning | $6M | |
| Cold wave | $3M | |
| Earthquake | $2M | |
| Strong wind | $2M | |
| Avalanche | $2M | |
| Winter weather | $1M | |
| Heat wave | $815K | |
| Ice storm | $354K |
Homes in Boulder
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 Boulder County
More cities in Boulder County
Other cities in Colorado
All ›Common questions about Boulder
Is Boulder safe from natural disasters?
Boulder is in Boulder County, which FEMA's National Risk Index rates relatively moderate overall, about average for the US. The biggest hazards are inland flooding, wildfire, tornado. No place is free of risk, so check the flood map and insurance for any home you consider.
What natural disasters happen in Boulder?
By expected yearly losses in Boulder County, the top hazards are inland flooding (Moderate), wildfire (High), tornado (High). Boulder County has been part of 17 federal disaster or emergency declarations for natural events.
Does Boulder get tornadoes?
Yes. NOAA records list 11 tornadoes in Boulder County since 1950; the strongest was an EF3 tornado on June 4, 2015 near Highland. FEMA rates tornado risk in the county high.
Do I need flood insurance in Boulder?
Standard home insurance does not cover floods. In Boulder County, about 2.3% 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.