riskbycounty
FEMA NRI v1.20Released December 2025Methodology

Imperial County Disaster Risk

Imperial County, California

FEMA Risk Rating

Relatively High

NRI score (0–100 relative scale)

96.5

FEMA composite county value

State Rank

#25

of 58, sorted high to low by RiskByCounty

Flood NRI score

94.1

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

99.2 / 100

Flood

94.1 / 100

Higher of FEMA Coastal Flooding (Not available) and Inland Flooding (94.1) NRI scores.

Wildfire

76.0 / 100

Hurricane

22.3 / 100

Tornado

11.4 / 100

FEMA NRI data summary

Selected hazard scores for Imperial County

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

Earthquake
99.2
Flood
94.1
Wildfire
76.0
Hurricane
22.3
Tornado
11.4

Higher of FEMA Coastal Flooding and Inland Flooding NRI scores

Displayed flood score
94.1
Coastal Flooding
Not available
Inland Flooding
94.1

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 California county records are included?
RiskByCounty includes 58 California county records from FEMA NRI v1.20 (December 2025).
Which FEMA county ratings appear in California?
FEMA NRI v1.20 (December 2025) county rating counts for California: Very Low: 3; Relatively Low: 7; Relatively Moderate: 17; Relatively High: 22; Very High: 9; Not available: 0.
How complete are the five selected hazard fields for California?
FEMA NRI v1.20 (December 2025) availability among 58 county records: Flood: 58 of 58; Wildfire: 58 of 58; Tornado: 58 of 58; Earthquake: 58 of 58; Hurricane: 8 of 58. RiskByCounty displays five selected hazard categories out of FEMA's 18.
What FEMA NRI information is available for Imperial County, CA?
Imperial County has an official FEMA NRI v1.20 composite rating of Relatively High and an NRI score (0–100 relative scale) of 96.5. RiskByCounty ranks it 25th of 58 California county records when sorting the FEMA composite NRI scores from high to low.
Which selected hazard scores are shown for Imperial County?
RiskByCounty displays five selected hazard categories out of FEMA's 18 using FEMA NRI v1.20 (December 2025). For Imperial County, Earthquake: 99.2; Flood: 94.1; Wildfire: 76.0; Hurricane: 22.3; Tornado: 11.4.
How is flood displayed for Imperial County?
RiskByCounty's flood display is the higher of FEMA Coastal Flooding and Inland Flooding NRI scores. For Imperial County, Coastal Flooding is Not available, Inland Flooding is 94.1, and the displayed flood score is 94.1.

Counties with Similar Risk

Madera County

California

-0.0

Relatively High

NRI score 96.4

Marin County

California

-0.1

Relatively High

NRI score 96.4

Humboldt County

California

+0.3

Relatively High

NRI score 96.8

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 Imperial County

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