Mequon, Wisconsin: natural disaster risk
How exposed Mequon is to floods, storms and other hazards, from FEMA and NOAA records for Ozaukee County.
Mequon is a city of 25,270 people in Ozaukee County, Wisconsin. FEMA's National Risk Index rates Ozaukee County relatively low for natural hazards overall, lower than most of the US. The costliest hazards there are inland flooding, cold wave and tornado, with about $33.1 million in expected losses a year across the county. The weather service has logged 223 storm reports in the county since 1960, including 4 tornadoes and 37 floods. About 1.5% of homes in the county carry federal flood insurance.
Risk figures are for Ozaukee County. FEMA National Risk Index December 2025; NOAA Storm Events; US Census Bureau ACS 2020 to 2024. Updated November 6, 2026.
Top risks in Mequon
Full Ozaukee County report ›- Check the FEMA flood map for your address, and ask the seller or landlord about past flooding.
- Price a flood policy now. Most new federal policies take 30 days to start.
- Insulate pipes in outside walls, crawl spaces and garages.
- Know how to shut off the main water valve.
- Pick a shelter spot: a basement, or an inside room on the lowest floor with no windows.
- Turn on emergency alerts on your phone and keep a weather radio.
All hazards
| Hazard | Rating | A year |
|---|---|---|
| Inland flooding | $17M | |
| Cold wave | $9M | |
| Tornado | $3M | |
| Hail | $1M | |
| Heat wave | $994K | |
| Strong wind | $608K | |
| Lightning | $344K | |
| Winter weather | $107K | |
| Earthquake | $103K | |
| Ice storm | $34K | |
| Wildfire | $15K | |
| Drought | $12K |
Homes in Mequon
Older homes and mobile homes usually take more damage in storms, floods and earthquakes. Ask about roof age, flood history and retrofits before you buy or rent.
Strongest tornadoes in Ozaukee County
Common questions about Mequon
Is Mequon safe from natural disasters?
Mequon is in Ozaukee County, which FEMA's National Risk Index rates relatively low overall, lower than most of the US. The biggest hazards are inland flooding, cold wave, tornado. No place is free of risk, so check the flood map and insurance for any home you consider.
What natural disasters happen in Mequon?
By expected yearly losses in Ozaukee County, the top hazards are inland flooding (Low), cold wave (Moderate), tornado (Low). Ozaukee County has been part of 11 federal disaster or emergency declarations for natural events.
Does Mequon get tornadoes?
Yes. NOAA records list 4 tornadoes in Ozaukee County since 1950; the strongest was an F4 tornado on August 22, 1964. FEMA rates tornado risk in the county low.
Do I need flood insurance in Mequon?
Standard home insurance does not cover floods. In Ozaukee County, about 1.5% of homes have federal flood insurance, and FEMA rates inland flooding risk low. Check the FEMA flood map for your address and get a quote even outside a high-risk zone.