West Allis, WI
Local storm history & FEMA National Risk Index data
West Allis is rated Relatively High for overall natural hazard risk — higher risk than most US counties — based on FEMA's National Risk Index for Milwaukee County, WI. The county's highest-rated hazards are cold wave, heat wave, and tornado.
Storm events near West Allis
NOAA-recorded tornado, hail, and flood events within 25 miles of West Allis's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to West Allis itself, not the whole county.
County-wide hazard risk
Every other hazard FEMA and NOAA track — including drought — is only scored at the county level. These are Milwaukee County's FEMA National Risk Index scores, covering West Allis along with the rest of the county, not a West Allis-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 29.5 | Very Low |
| Inland Flooding | 97 | Relatively High |
| Coastal Flooding | 35.6 | Very Low |
| Earthquake | 80.8 | Relatively Low |
| Heat Wave | 99 | Relatively High |
| Tornado | 99 | Very High |
| Avalanche | — | Not Applicable |
| Cold Wave | 100 | Very High |
| Drought | 16.7 | Very Low |
| Hail | 86.2 | Relatively Moderate |
| Hurricane | 18.8 | Very Low |
| Ice Storm | 77.1 | Relatively Moderate |
| Landslide | 31 | Very Low |
| Lightning | 61.7 | Relatively Moderate |
| Strong Wind | 94.8 | Relatively High |
| Tsunami | — | Insufficient Data |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 96.8 | Very High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Milwaukee County risk profile for disaster declarations, social vulnerability, and climate projection data.
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Frequently asked questions
What natural hazards is West Allis, WI at risk of?
West Allis is rated Relatively High for overall natural hazard risk by FEMA's National Risk Index — higher risk than most US counties. The highest-rated hazards for Milwaukee County, where West Allis is located, are cold wave, heat wave, and tornado.
What is West Allis's biggest natural hazard risk?
Cold Wave is the highest-rated hazard for Milwaukee County, where West Allis is located, scoring 100 out of 100 on FEMA's National Risk Index (rated "Very High").
Is West Allis a high-risk area for natural disasters?
Yes — West Allis carries higher risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively High" for Milwaukee County.
Has West Allis had tornadoes, hail, or flooding?
NOAA has recorded 6 tornado, 226 hail, 77 inland flooding events within 25 miles of West Allis since 2016.