riskbycounty
FEMA NRI v1.20Released December 2025Methodology

Chatham County Disaster Risk

Chatham County, North Carolina

FEMA Risk Rating

Relatively Low

NRI score (0–100 relative scale)

67.2

FEMA composite county value

State Rank

#57

of 100, sorted high to low by RiskByCounty

Flood NRI score

74.4

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

83.4 / 100

Tornado

75.8 / 100

Flood

74.4 / 100

Higher of FEMA Coastal Flooding (Not available) and Inland Flooding (74.4) NRI scores.

Earthquake

61.3 / 100

Wildfire

33.0 / 100

FEMA NRI data summary

Selected hazard scores for Chatham County

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

Hurricane
83.4
Tornado
75.8
Flood
74.4
Earthquake
61.3
Wildfire
33.0

Higher of FEMA Coastal Flooding and Inland Flooding NRI scores

Displayed flood score
74.4
Coastal Flooding
Not available
Inland Flooding
74.4

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 North Carolina county records are included?
RiskByCounty includes 100 North Carolina county records from FEMA NRI v1.20 (December 2025).
Which FEMA county ratings appear in North Carolina?
FEMA NRI v1.20 (December 2025) county rating counts for North Carolina: Very Low: 17; Relatively Low: 52; Relatively Moderate: 26; Relatively High: 5; Very High: 0; Not available: 0.
How complete are the five selected hazard fields for North Carolina?
FEMA NRI v1.20 (December 2025) availability among 100 county records: Flood: 100 of 100; Wildfire: 100 of 100; Tornado: 100 of 100; Earthquake: 100 of 100; Hurricane: 100 of 100. RiskByCounty displays five selected hazard categories out of FEMA's 18.
What FEMA NRI information is available for Chatham County, NC?
Chatham County has an official FEMA NRI v1.20 composite rating of Relatively Low and an NRI score (0–100 relative scale) of 67.2. RiskByCounty ranks it 57th of 100 North Carolina county records when sorting the FEMA composite NRI scores from high to low.
Which selected hazard scores are shown for Chatham County?
RiskByCounty displays five selected hazard categories out of FEMA's 18 using FEMA NRI v1.20 (December 2025). For Chatham County, Hurricane: 83.4; Tornado: 75.8; Flood: 74.4; Earthquake: 61.3; Wildfire: 33.0.
How is flood displayed for Chatham County?
RiskByCounty's flood display is the higher of FEMA Coastal Flooding and Inland Flooding NRI scores. For Chatham County, Coastal Flooding is Not available, Inland Flooding is 74.4, and the displayed flood score is 74.4.

Counties with Similar Risk

Caldwell County

North Carolina

+0.3

Relatively Low

NRI score 67.4

Lee County

North Carolina

+0.3

Relatively Low

NRI score 67.5

Ashe County

North Carolina

-0.4

Relatively Low

NRI score 66.8

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.

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