FEMA National Risk Index
Natural Disaster Risk by County
FEMA NRI scores on a 0–100 relative scale. RiskByCounty displays five selected hazard categories out of FEMA's 18; flood uses the higher of FEMA Coastal Flooding and Inland Flooding scores.
Tap a hazard to spotlight the riskiest counties.
Find your county's risk
How RiskByCounty Works
Explore FEMA NRI v1.20 county data released in December 2025
Step 1
Find your county
Search by name or browse by state to access FEMA NRI v1.20 county records.
Step 2
Compare risk scores
Compare FEMA's composite score and five selected hazard categories out of FEMA's 18.
Step 3
Explore hazard data
Read NRI scores on FEMA’s 0–100 relative scale and official FEMA county ratings.
Step 4
Read risk guides
Read the retained explainer and follow direct links to official FEMA documentation.
Chittenden County
Vermont
NRI score (0–100 relative scale)
63.9
out of 100
Risk Rating
Relatively Low
Composite NRI score
63.9
Highest selected score
Earthquake
Second selected score
Flood
Interactive Risk Tools
Explore, compare, and analyze natural disaster risk data across all 3,100+ US counties.
Risk Articles
Source-focused information about FEMA NRI v1.20 and its county fields.
Browse ArticlesHazard Breakdown
Five selected hazard categories out of FEMA's 18, including the disclosed flood display rule.
Explore by StateCounty Rankings
Highest and lowest risk counties nationwide, ranked by FEMA composite risk scores.
View RankingsRisk Guides & Analysis
Source-focused information about FEMA NRI v1.20 county data.
What We Track
Five selected hazard categories out of FEMA's 18. Flood is the higher of the Coastal Flooding and Inland Flooding NRI scores.
Flood
Higher FEMA coastal/inland score
Wildfire
FEMA Wildfire NRI score
Tornado
FEMA Tornado NRI score
Earthquake
FEMA Earthquake NRI score
Hurricane
FEMA Hurricane NRI score
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
County records ordered by FEMA NRI v1.20 composite score.
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 NRI scores
NRI scores use a 0–100 relative scale; they are not percentages or event probabilities.
Relative Risk
RiskByCounty presents FEMA's source scores and official county ratings without creating state ratings.
Official source
Review the methodology or continue to FEMA's official NRI documentation.