riskbycounty
FEMA NRI v1.20Released December 2025Methodology

Martin County Disaster Risk

Martin County, Florida

FEMA Risk Rating

Relatively Moderate

NRI score (0–100 relative scale)

94.1

FEMA composite county value

State Rank

#23

of 67, sorted high to low by RiskByCounty

Flood NRI score

83.3

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.

Hurricane

98.7 / 100

Wildfire

90.4 / 100

Flood

83.3 / 100

Higher of FEMA Coastal Flooding (73.0) and Inland Flooding (83.3) NRI scores.

Tornado

74.8 / 100

Earthquake

21.4 / 100

FEMA NRI data summary

Selected hazard scores for Martin County

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

Hurricane
98.7
Wildfire
90.4
Flood
83.3
Tornado
74.8
Earthquake
21.4

Higher of FEMA Coastal Flooding and Inland Flooding NRI scores

Displayed flood score
83.3
Coastal Flooding
73.0
Inland Flooding
83.3

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

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Frequently Asked Questions

How many Florida county records are included?
RiskByCounty includes 67 Florida county records from FEMA NRI v1.20 (December 2025).
Which FEMA county ratings appear in Florida?
FEMA NRI v1.20 (December 2025) county rating counts for Florida: Very Low: 8; Relatively Low: 20; Relatively Moderate: 18; Relatively High: 20; Very High: 1; Not available: 0.
How complete are the five selected hazard fields for Florida?
FEMA NRI v1.20 (December 2025) availability among 67 county records: Flood: 67 of 67; Wildfire: 67 of 67; Tornado: 67 of 67; Earthquake: 67 of 67; Hurricane: 67 of 67. RiskByCounty displays five selected hazard categories out of FEMA's 18.
What FEMA NRI information is available for Martin County, FL?
Martin County has an official FEMA NRI v1.20 composite rating of Relatively Moderate and an NRI score (0–100 relative scale) of 94.1. RiskByCounty ranks it 23rd of 67 Florida county records when sorting the FEMA composite NRI scores from high to low.
Which selected hazard scores are shown for Martin County?
RiskByCounty displays five selected hazard categories out of FEMA's 18 using FEMA NRI v1.20 (December 2025). For Martin County, Hurricane: 98.7; Wildfire: 90.4; Flood: 83.3; Tornado: 74.8; Earthquake: 21.4.
How is flood displayed for Martin County?
RiskByCounty's flood display is the higher of FEMA Coastal Flooding and Inland Flooding NRI scores. For Martin County, Coastal Flooding is 73.0, Inland Flooding is 83.3, and the displayed flood score is 83.3.

Counties with Similar Risk

Bay County

Florida

+0.0

Relatively Moderate

NRI score 94.1

Citrus County

Florida

+0.6

Relatively High

NRI score 94.7

Marion County

Florida

+0.6

Relatively High

NRI score 94.7

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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