St. Ann, MO
Local storm history & FEMA National Risk Index data
St. Ann is rated Relatively High for overall natural hazard risk — higher risk than most US counties — based on FEMA's National Risk Index for St. Louis County, MO. The county's highest-rated hazards are heat wave, hail, and lightning.
Storm events near St. Ann
NOAA-recorded tornado, hail, and flood events within 25 miles of St. Ann's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to St. Ann 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 St. Louis County's FEMA National Risk Index scores, covering St. Ann along with the rest of the county, not a St. Ann-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 61.7 | Very Low |
| Inland Flooding | 99.1 | Relatively High |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 99 | Relatively High |
| Heat Wave | 99.9 | Very High |
| Tornado | 98.1 | Relatively High |
| Avalanche | — | Not Applicable |
| Cold Wave | 99.1 | Very High |
| Drought | 27.8 | Very Low |
| Hail | 99.7 | Very High |
| Hurricane | 45.1 | Very Low |
| Ice Storm | 98.8 | Very High |
| Landslide | 97.6 | Relatively Moderate |
| Lightning | 99.3 | Very High |
| Strong Wind | 89.8 | Relatively High |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 98.3 | Very High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full St. Louis County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in St. Louis County:
More on St. Louis County:
Frequently asked questions
What natural hazards is St. Ann, MO at risk of?
St. Ann 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 St. Louis County, where St. Ann is located, are heat wave, hail, and lightning.
What is St. Ann's biggest natural hazard risk?
Heat Wave is the highest-rated hazard for St. Louis County, where St. Ann is located, scoring 99.9 out of 100 on FEMA's National Risk Index (rated "Very High").
Is St. Ann a high-risk area for natural disasters?
Yes — St. Ann carries higher risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively High" for St. Louis County.
Has St. Ann had tornadoes, hail, or flooding?
NOAA has recorded 38 tornado, 348 hail, 72 inland flooding events within 25 miles of St. Ann since 2016.