FEMA National Risk Index
Natural Disaster Risk by County
Flood, wildfire, tornado, earthquake, and hurricane risk scores for every US county. Powered by FEMA data.
3,144
Total Counties
3,144
With Risk Data
5
Hazard Types
San Francisco County
California
Composite Risk Score
99.5
out of 100
Risk Rating
Very High
Risk Score
99.5
Top Hazard
Earthquake
2nd Hazard
Flood
San Francisco faces extreme earthquake and flood risk
San Francisco County's composite risk score of 99.52 ranks it as "Very High" and among the nation's riskiest counties, substantially above the typical U.S. baseline. Though it exceeds California's 88.72 average, the city's lower wildfire exposure (28.66) partially offsets other hazards.
What We Track
Five major natural hazard categories scored for every US county.
Flood
River, coastal & surface flooding
Wildfire
Wildland & interface fire risk
Tornado
Tornado & severe storm risk
Earthquake
Seismic & ground shaking risk
Hurricane
Tropical cyclone risk
Browse by State
Select a state to view natural disaster risk scores for every county.
Alabama
67 counties
Alaska
30 counties
Arizona
15 counties
Arkansas
75 counties
California
58 counties
Colorado
64 counties
Connecticut
9 counties
Delaware
3 counties
District of Columbia
1 county
Florida
67 counties
Georgia
159 counties
Hawaii
5 counties
Idaho
44 counties
Illinois
102 counties
Indiana
92 counties
Iowa
99 counties
Kansas
105 counties
Kentucky
120 counties
Louisiana
64 counties
Maine
16 counties
Maryland
24 counties
Massachusetts
14 counties
Michigan
83 counties
Minnesota
87 counties
Mississippi
82 counties
Missouri
115 counties
Montana
56 counties
Nebraska
93 counties
Nevada
17 counties
New Hampshire
10 counties
New Jersey
21 counties
New Mexico
33 counties
New York
62 counties
North Carolina
100 counties
North Dakota
53 counties
Ohio
88 counties
Oklahoma
77 counties
Oregon
36 counties
Pennsylvania
67 counties
Rhode Island
5 counties
South Carolina
46 counties
South Dakota
66 counties
Tennessee
95 counties
Texas
254 counties
Utah
29 counties
Vermont
14 counties
Virginia
133 counties
Washington
39 counties
West Virginia
55 counties
Wisconsin
72 counties
Wyoming
23 counties
Highest Risk Counties
Counties with the highest composite natural disaster risk scores.
Los Angeles County
California
Cook County
Illinois
Harris County
Texas
Riverside County
California
Maricopa County
Arizona
San Bernardino County
California
Orange County
California
Alameda County
California
Understanding Risk Scores
FEMA Scores
FEMA's National Risk Index scores every county 0–100 for each hazard type.
Relative Risk
Scores compare counties to each other — higher = relatively more at-risk nationally.
Plan Ahead
Use data to understand your county's risk profile and make informed decisions.