riskbycounty
FEMA National Risk Index

Ozaukee County Disaster Risk

Ozaukee County, Wisconsin

FEMA Risk Rating

Relatively Low

National Percentile

50th

of 3,144 counties

State Rank

#47

of 72 (1 = highest risk)

Flood Risk

58th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Relatively Low

Higher than 58% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Very Low

Higher than 19% of US counties

Tornado

Tornado and severe thunderstorm risk

Relatively Low

Higher than 59% of US counties

Earthquake

Seismic activity and ground shaking risk

Very Low

Higher than 26% of US counties

Hurricane

Tropical cyclone and hurricane risk

Very Low

Higher than 7% of US counties

Risk Advisory: Ozaukee County

Risk Verdict

Ozaukee County shows a relatively low overall disaster risk profile, scoring in the 50th percentile nationally. The county faces moderate hazard exposure relative to other U.S. counties. Standard emergency preparedness is recommended, with attention to the specific hazards that dominate locally.

Hazard Breakdown

Tornado risk is the dominant hazard for Ozaukee County, scoring in the 59th percentile nationally. It is followed by flood risk at the 58th percentile. Additional hazards include earthquake (26th), wildfire (19th), hurricane (7th).

Preparedness Context

With tornado risk as the top concern, Ozaukee County residents should identify a safe room or interior space on the lowest floor, have a NOAA weather radio, and practice tornado drills with your household. Secondary risks such as flood also warrant attention in household and community preparedness planning. FEMA recommends all households maintain at least 72 hours of food, water, and medication supplies regardless of specific hazard exposure.

Regional Context

Ozaukee County is notably safer than the average county in Wisconsin. Its composite risk score is 8.8 points lower than the state average, indicating below-average exposure to natural hazards relative to other counties in the state.

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Frequently Asked Questions

What is the natural disaster risk in Ozaukee County, WI?
Ozaukee County has a FEMA National Risk Index rating of Relatively Low, placing it in the 50th percentile nationally out of 3,144 counties. This composite score reflects the county's overall exposure to natural hazards including floods, wildfires, tornadoes, earthquakes, and hurricanes, weighted by expected annual loss and social vulnerability.
What types of natural hazards affect Ozaukee County?
Ozaukee County is evaluated for five major natural hazard types: tornado (59th percentile), flooding (58th percentile), earthquake (26th percentile), wildfire (19th percentile), hurricane (7th percentile). The highest-risk hazard is tornado at the 59th percentile nationally. These scores are derived from FEMA's National Risk Index, which analyzes expected annual loss, social vulnerability, and community resilience for each hazard type.
How does Ozaukee County risk compare to the Wisconsin average?
Ozaukee County's composite risk percentile is 50th, compared to the Wisconsin state average of 59th percentile. The state's overall risk rating is Relatively Low. This means Ozaukee County faces lower natural disaster risk than the typical county in Wisconsin.
Is Ozaukee County at risk for tornado?
Yes, Ozaukee County's tornado risk is at the 59th percentile nationally. This is above the national median. For flooding specifically, Ozaukee County is at the 58th percentile.
How is natural disaster risk measured?
FEMA's National Risk Index (NRI) calculates risk scores for 18 natural hazard types across all U.S. counties and census tracts. The composite score combines Expected Annual Loss (estimated dollar losses from each hazard), Social Vulnerability (demographic factors affecting disaster impact), and Community Resilience (ability to recover). Percentile scores rank each county against all 3,144 U.S. counties, and risk ratings range from Very Low to Very High.
Is Ozaukee County a safe place to live?
Ozaukee County's composite risk score of 50th percentile is below the Wisconsin state average of 59th percentile, indicating relatively lower exposure to natural hazards. However, no county is completely risk-free. The primary hazard type is tornado at the 59th percentile. Residents should still maintain emergency preparedness plans and appropriate insurance coverage.

Counties with Similar Risk

Langlade County

Wisconsin

-0.8

Relatively Low

50th percentile

Burnett County

Wisconsin

-1.0

Relatively Low

49th percentile

Richland County

Wisconsin

+1.2

Relatively Low

52th percentile

By Logan Johnson, Founder & Data EditorUpdated Reviewed by Logan Johnson, Founder & Data Editor

Data Source

Risk data sourced from the FEMA National Risk Index (NRI). Risk scores are relative rankings (0–100) across all US counties — not absolute risk measures. Higher scores indicate higher relative risk compared to other counties.

Disclaimer: This data is informational only. It is not financial, insurance, or legal advice. Always consult a qualified professional before making insurance or real estate decisions.

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