riskbycounty
FEMA NRI v1.20Released December 2025Methodology

Milwaukee County Disaster Risk

Milwaukee County, Wisconsin

FEMA Risk Rating

Relatively High

NRI score (0–100 relative scale)

98.4

FEMA composite county value

State Rank

#1

of 72, sorted high to low by RiskByCounty

Flood NRI score

97.0

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

99.0 / 100

Flood

97.0 / 100

Higher of FEMA Coastal Flooding (35.6) and Inland Flooding (97.0) NRI scores.

Earthquake

80.8 / 100

Wildfire

29.5 / 100

Hurricane

18.8 / 100

FEMA NRI data summary

Selected hazard scores for Milwaukee County

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

Tornado
99.0
Flood
97.0
Earthquake
80.8
Wildfire
29.5
Hurricane
18.8

Higher of FEMA Coastal Flooding and Inland Flooding NRI scores

Displayed flood score
97.0
Coastal Flooding
35.6
Inland Flooding
97.0

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 Wisconsin county records are included?
RiskByCounty includes 72 Wisconsin county records from FEMA NRI v1.20 (December 2025).
Which FEMA county ratings appear in Wisconsin?
FEMA NRI v1.20 (December 2025) county rating counts for Wisconsin: Very Low: 15; Relatively Low: 47; Relatively Moderate: 9; Relatively High: 1; Very High: 0; Not available: 0.
How complete are the five selected hazard fields for Wisconsin?
FEMA NRI v1.20 (December 2025) availability among 72 county records: Flood: 72 of 72; Wildfire: 72 of 72; Tornado: 72 of 72; Earthquake: 72 of 72; Hurricane: 66 of 72. RiskByCounty displays five selected hazard categories out of FEMA's 18.
What FEMA NRI information is available for Milwaukee County, WI?
Milwaukee County has an official FEMA NRI v1.20 composite rating of Relatively High and an NRI score (0–100 relative scale) of 98.4. RiskByCounty ranks it 1st of 72 Wisconsin county records when sorting the FEMA composite NRI scores from high to low.
Which selected hazard scores are shown for Milwaukee County?
RiskByCounty displays five selected hazard categories out of FEMA's 18 using FEMA NRI v1.20 (December 2025). For Milwaukee County, Tornado: 99.0; Flood: 97.0; Earthquake: 80.8; Wildfire: 29.5; Hurricane: 18.8.
How is flood displayed for Milwaukee County?
RiskByCounty's flood display is the higher of FEMA Coastal Flooding and Inland Flooding NRI scores. For Milwaukee County, Coastal Flooding is 35.6, Inland Flooding is 97.0, and the displayed flood score is 97.0.

Counties with Similar Risk

Dane County

Wisconsin

-4.5

Relatively Moderate

NRI score 93.9

Brown County

Wisconsin

-8.3

Relatively Moderate

NRI score 90.0

Waukesha County

Wisconsin

-9.5

Relatively Moderate

NRI score 88.9

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 Milwaukee County

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