riskbycounty
FEMA NRI v1.20Released December 2025Methodology

Musselshell County Disaster Risk

Musselshell County, Montana

FEMA Risk Rating

Very Low

NRI score (0–100 relative scale)

17.0

FEMA composite county value

State Rank

#34

of 56, sorted high to low by RiskByCounty

Flood NRI score

15.5

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.

Wildfire

91.9 / 100

Earthquake

20.7 / 100

Flood

15.5 / 100

Higher of FEMA Coastal Flooding (Not available) and Inland Flooding (15.5) NRI scores.

Tornado

8.1 / 100

FEMA NRI data summary

Selected hazard scores for Musselshell County

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

Wildfire
91.9
Earthquake
20.7
Flood
15.5
Tornado
8.1
Hurricane
Not available

Higher of FEMA Coastal Flooding and Inland Flooding NRI scores

Displayed flood score
15.5
Coastal Flooding
Not available
Inland Flooding
15.5

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 Montana county records are included?
RiskByCounty includes 56 Montana county records from FEMA NRI v1.20 (December 2025).
Which FEMA county ratings appear in Montana?
FEMA NRI v1.20 (December 2025) county rating counts for Montana: Very Low: 34; Relatively Low: 18; Relatively Moderate: 4; Relatively High: 0; Very High: 0; Not available: 0.
How complete are the five selected hazard fields for Montana?
FEMA NRI v1.20 (December 2025) availability among 56 county records: Flood: 56 of 56; Wildfire: 56 of 56; Tornado: 56 of 56; Earthquake: 56 of 56; Hurricane: 0 of 56. RiskByCounty displays five selected hazard categories out of FEMA's 18.
What FEMA NRI information is available for Musselshell County, MT?
Musselshell County has an official FEMA NRI v1.20 composite rating of Very Low and an NRI score (0–100 relative scale) of 17.0. RiskByCounty ranks it 34th of 56 Montana county records when sorting the FEMA composite NRI scores from high to low.
Which selected hazard scores are shown for Musselshell County?
RiskByCounty displays five selected hazard categories out of FEMA's 18 using FEMA NRI v1.20 (December 2025). For Musselshell County, Wildfire: 91.9; Earthquake: 20.7; Flood: 15.5; Tornado: 8.1.
How is flood displayed for Musselshell County?
RiskByCounty's flood display is the higher of FEMA Coastal Flooding and Inland Flooding NRI scores. For Musselshell County, Coastal Flooding is Not available, Inland Flooding is 15.5, and the displayed flood score is 15.5.

Counties with Similar Risk

Stillwater County

Montana

-0.3

Very Low

NRI score 16.8

Deer Lodge County

Montana

+0.5

Very Low

NRI score 17.6

Broadwater County

Montana

+0.6

Very Low

NRI score 17.7

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.

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