riskbycounty
FEMA NRI v1.20Released December 2025Methodology

Perry County Disaster Risk

Perry County, Illinois

FEMA Risk Rating

Relatively Low

NRI score (0–100 relative scale)

72.1

FEMA composite county value

State Rank

#31

of 102, sorted high to low by RiskByCounty

Flood NRI score

49.8

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

94.3 / 100

Tornado

60.6 / 100

Flood

49.8 / 100

Higher of FEMA Coastal Flooding (Not available) and Inland Flooding (49.8) NRI scores.

Hurricane

40.5 / 100

Wildfire

3.8 / 100

FEMA NRI data summary

Selected hazard scores for Perry County

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

Earthquake
94.3
Tornado
60.6
Flood
49.8
Hurricane
40.5
Wildfire
3.8

Higher of FEMA Coastal Flooding and Inland Flooding NRI scores

Displayed flood score
49.8
Coastal Flooding
Not available
Inland Flooding
49.8

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 Illinois county records are included?
RiskByCounty includes 102 Illinois county records from FEMA NRI v1.20 (December 2025).
Which FEMA county ratings appear in Illinois?
FEMA NRI v1.20 (December 2025) county rating counts for Illinois: Very Low: 37; Relatively Low: 45; Relatively Moderate: 14; Relatively High: 5; Very High: 1; Not available: 0.
How complete are the five selected hazard fields for Illinois?
FEMA NRI v1.20 (December 2025) availability among 102 county records: Flood: 102 of 102; Wildfire: 102 of 102; Tornado: 102 of 102; Earthquake: 102 of 102; Hurricane: 102 of 102. RiskByCounty displays five selected hazard categories out of FEMA's 18.
What FEMA NRI information is available for Perry County, IL?
Perry County has an official FEMA NRI v1.20 composite rating of Relatively Low and an NRI score (0–100 relative scale) of 72.1. RiskByCounty ranks it 31st of 102 Illinois county records when sorting the FEMA composite NRI scores from high to low.
Which selected hazard scores are shown for Perry County?
RiskByCounty displays five selected hazard categories out of FEMA's 18 using FEMA NRI v1.20 (December 2025). For Perry County, Earthquake: 94.3; Tornado: 60.6; Flood: 49.8; Hurricane: 40.5; Wildfire: 3.8.
How is flood displayed for Perry County?
RiskByCounty's flood display is the higher of FEMA Coastal Flooding and Inland Flooding NRI scores. For Perry County, Coastal Flooding is Not available, Inland Flooding is 49.8, and the displayed flood score is 49.8.

Counties with Similar Risk

Livingston County

Illinois

-0.3

Relatively Low

NRI score 71.8

Morgan County

Illinois

-1.0

Relatively Low

NRI score 71.1

Ogle County

Illinois

-1.0

Relatively Low

NRI score 71.1

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 Perry County

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