riskbycounty
FEMA NRI v1.20Released December 2025Methodology

Lake County Disaster Risk

Lake County, Illinois

FEMA Risk Rating

Relatively High

NRI score (0–100 relative scale)

96.0

FEMA composite county value

State Rank

#4

of 102, sorted high to low by RiskByCounty

Flood NRI score

97.2

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.

Tornado

98.9 / 100

Flood

97.2 / 100

Higher of FEMA Coastal Flooding (29.8) and Inland Flooding (97.2) NRI scores.

Earthquake

85.7 / 100

Wildfire

44.9 / 100

Hurricane

18.2 / 100

FEMA NRI data summary

Selected hazard scores for Lake County

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

Tornado
98.9
Flood
97.2
Earthquake
85.7
Wildfire
44.9
Hurricane
18.2

Higher of FEMA Coastal Flooding and Inland Flooding NRI scores

Displayed flood score
97.2
Coastal Flooding
29.8
Inland Flooding
97.2

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 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 Lake County, IL?
Lake County has an official FEMA NRI v1.20 composite rating of Relatively High and an NRI score (0–100 relative scale) of 96.0. RiskByCounty ranks it 4th of 102 Illinois county records when sorting the FEMA composite NRI scores from high to low.
Which selected hazard scores are shown for Lake County?
RiskByCounty displays five selected hazard categories out of FEMA's 18 using FEMA NRI v1.20 (December 2025). For Lake County, Tornado: 98.9; Flood: 97.2; Earthquake: 85.7; Wildfire: 44.9; Hurricane: 18.2.
How is flood displayed for Lake County?
RiskByCounty's flood display is the higher of FEMA Coastal Flooding and Inland Flooding NRI scores. For Lake County, Coastal Flooding is 29.8, Inland Flooding is 97.2, and the displayed flood score is 97.2.

Counties with Similar Risk

St. Clair County

Illinois

-1.1

Relatively High

NRI score 94.9

Will County

Illinois

+1.3

Relatively High

NRI score 97.3

Kane County

Illinois

-1.4

Relatively High

NRI score 94.6

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 Lake County

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