riskbycounty
FEMA NRI v1.20Released December 2025Methodology

Salt Lake County Disaster Risk

Salt Lake County, Utah

FEMA Risk Rating

Relatively High

NRI score (0–100 relative scale)

98.6

FEMA composite county value

State Rank

#1

of 29, sorted high to low by RiskByCounty

Flood NRI score

92.9

higher coastal/inland value

Hazard Risk Breakdown

Five selected hazard categories out of FEMA's 18. Values are FEMA NRI v1.20 scores on a 0–100 relative scale.

Earthquake

99.6 / 100

Wildfire

98.3 / 100

Flood

92.9 / 100

Higher of FEMA Coastal Flooding (0.0) and Inland Flooding (92.9) NRI scores.

Tornado

71.0 / 100

FEMA NRI data summary

Selected hazard scores for Salt Lake County

Among the five hazard categories displayed by RiskByCounty, earthquake has the highest NRI score for this county.

Earthquake
99.6
Wildfire
98.3
Flood
92.9
Tornado
71.0
Hurricane
Not available

Higher of FEMA Coastal Flooding and Inland Flooding NRI scores

Displayed flood score
92.9
Coastal Flooding
0.0
Inland Flooding
92.9

These five categories are a selected subset of FEMA's 18 natural hazards. FEMA's composite score and official rating are separate fields in the National Risk Index dataset.

FEMA National Risk Index documentation

Official Ready.gov resource

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

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Frequently Asked Questions

How many Utah county records are included?
RiskByCounty includes 29 Utah county records from FEMA NRI v1.20 (December 2025).
Which FEMA county ratings appear in Utah?
FEMA NRI v1.20 (December 2025) county rating counts for Utah: Very Low: 19; Relatively Low: 5; Relatively Moderate: 3; Relatively High: 2; Very High: 0; Not available: 0.
How complete are the five selected hazard fields for Utah?
FEMA NRI v1.20 (December 2025) availability among 29 county records: Flood: 29 of 29; Wildfire: 29 of 29; Tornado: 29 of 29; Earthquake: 29 of 29; Hurricane: 0 of 29. RiskByCounty displays five selected hazard categories out of FEMA's 18.
What FEMA NRI information is available for Salt Lake County, UT?
Salt Lake County has an official FEMA NRI v1.20 composite rating of Relatively High and an NRI score (0–100 relative scale) of 98.6. RiskByCounty ranks it 1st of 29 Utah county records when sorting the FEMA composite NRI scores from high to low.
Which selected hazard scores are shown for Salt Lake County?
RiskByCounty displays five selected hazard categories out of FEMA's 18 using FEMA NRI v1.20 (December 2025). For Salt Lake County, Earthquake: 99.6; Wildfire: 98.3; Flood: 92.9; Tornado: 71.0.
How is flood displayed for Salt Lake County?
RiskByCounty's flood display is the higher of FEMA Coastal Flooding and Inland Flooding NRI scores. For Salt Lake County, Coastal Flooding is 0.0, Inland Flooding is 92.9, and the displayed flood score is 92.9.

Counties with Similar Risk

Utah County

Utah

-3.2

Relatively High

NRI score 95.3

Washington County

Utah

-5.8

Relatively Moderate

NRI score 92.8

Davis County

Utah

-10.8

Relatively Moderate

NRI score 87.8

Published by RiskByCounty

County summaries are deterministic transformations of frozen FEMA county fields. No external subject-matter reviewer is credited.

Published · Updated

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.

Explore more data for Salt Lake County

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