Powered by FEMA National Risk Index

How risky is your county?

Free natural disaster risk data for every US county, powered by FEMA's National Risk Index.

3,232 counties seeded · v1.20 · Updated December 2025

County Risk Rankings

↑ Highest Risk Counties

1 Los Angeles County, CA
100.0 Very High
2 Cook County, IL
100.0 Very High
3 Maricopa County, AZ
99.9 Very High
4 Riverside County, CA
99.9 Very High
5 Harris County, TX
99.9 Very High

↓ Lowest Risk Counties

1 Loving County, TX
0.0 Very Low
2 Eastern District, AS
0.0 Very Low
3 Manu'a District, AS
0.0 Very Low
4 Western District, AS
0.0 Very Low
5 Guam, GU
0.0 Very Low

Browse by Hazard

FEMA tracks 18 natural hazard types. Click any to see the riskiest US counties.

Avalanche Coastal Flood Cold Wave Drought Earthquake Hail Heat Wave Hurricane Ice Storm Riverine Flood Landslide Lightning Strong Wind Tornado Tsunami Volcanic Activity Wildfire Winter Weather

About the Data

All risk data comes from the FEMA National Risk Index (NRI) v1.20, released December 2025 under OpenFEMA's public-domain terms. Each county's composite score combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.

DisasterRiskIndex.com is not affiliated with FEMA. Data is county-level only — not address-specific. This is not insurance or financial advice.