riskbycounty
FEMA NRI v1.20Released December 2025Methodology

Tennessee Disaster Risk

Natural disaster risk data for all 95 counties.

FEMA release

December 2025

Mean county NRI score

52.5

Counties with Data

95

of 95 total

County risk atlas

Tennessee hazard exposure by county

FEMA NRI v1.20 scores on a 0–100 relative scale. Toggle the composite and five selected hazard categories out of FEMA's 18. Flood is the higher of Coastal Flooding and Inland Flooding NRI scores.

Counties

95/95

Mean county NRI score

52.5

Risk layers

6

All Tennessee Counties

CountyNRI score
Shelby County99.4
Davidson County97.2
Hamilton County93.3
Knox County92.1
Madison County92.1
Rutherford County91.7
Sumner County87.7
Montgomery County87.4
Dyer County86.6
Gibson County85.9
Williamson County85.1
Henry County84.7
Obion County81.3
Tipton County81.0
Wilson County80.0
Maury County79.3
Sevier County77.4
Fayette County76.0
Blount County74.2
Weakley County74.0
Bradley County73.4
Anderson County73.2
Carroll County72.8
Lauderdale County71.6
Sullivan County71.5
Hardin County70.7
Lawrence County69.7
Bedford County69.2
Roane County69.0
Loudon County68.4
Cumberland County67.2
Putnam County65.8
Haywood County64.7
Coffee County63.5
Warren County63.5
Carter County63.2
Henderson County63.1
Hardeman County63.0
Washington County61.2
Giles County60.9
Monroe County60.9
Robertson County60.4
McMinn County60.2
Lincoln County58.9
Marion County58.2
Campbell County58.0
Franklin County57.5
Greene County56.3
Hawkins County55.8
Cocke County54.5
Dickson County53.5
Crockett County52.6
McNairy County50.5
Rhea County49.2
Humphreys County48.3
Lake County47.8
Hickman County47.2
Hamblen County47.1
Cheatham County46.3
Marshall County45.4
Jefferson County44.9
Chester County44.5
Wayne County43.0
Claiborne County42.8
Sequatchie County40.2
Benton County39.1
White County38.5
Decatur County38.4
Macon County34.6
Grundy County34.3
Perry County33.4
Polk County31.2
Stewart County29.4
Fentress County28.4
Johnson County28.2
Scott County26.1
DeKalb County25.5
Bledsoe County24.1
Cannon County22.9
Jackson County22.5
Overton County22.2
Morgan County19.1
Smith County18.8
Grainger County18.6
Lewis County13.9
Clay County13.3
Houston County13.1
Union County12.9
Meigs County12.7
Hancock County11.9
Unicoi County10.6
Moore County9.9
Trousdale County6.1
Pickett County4.6
Van Buren County2.7

Frequently Asked Questions

How many Tennessee county records are included?
RiskByCounty includes 95 Tennessee county records from FEMA NRI v1.20 (December 2025).
Which FEMA county ratings appear in Tennessee?
FEMA NRI v1.20 (December 2025) county rating counts for Tennessee: Very Low: 31; Relatively Low: 50; Relatively Moderate: 12; Relatively High: 2; Very High: 0; Not available: 0.
How complete are the five selected hazard fields for Tennessee?
FEMA NRI v1.20 (December 2025) availability among 95 county records: Flood: 95 of 95; Wildfire: 95 of 95; Tornado: 95 of 95; Earthquake: 95 of 95; Hurricane: 95 of 95. RiskByCounty displays five selected hazard categories out of FEMA's 18.

Official Ready.gov resource

Continue to Ready.gov for federal emergency-planning information maintained outside RiskByCounty.

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Data Source

County data sourced from FEMA National Risk Index v1.20, released December 2025. Values are labeled NRI score (0–100 relative scale). RiskByCounty displays five selected hazard categories out of FEMA's 18; flood is the higher of the Coastal Flooding and Inland Flooding source scores.

RiskByCounty presents county-level source fields and deterministic arithmetic summaries.

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