Mount Vernon, IL
Local storm history & FEMA National Risk Index data
Mount Vernon is rated Relatively Low for overall natural hazard risk — lower risk than most US counties — based on FEMA's National Risk Index for Jefferson County, IL. The county's highest-rated hazards are earthquake, strong wind, and winter weather.
Storm events near Mount Vernon
NOAA-recorded tornado, hail, and flood events within 25 miles of Mount Vernon's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Mount Vernon 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 Jefferson County's FEMA National Risk Index scores, covering Mount Vernon along with the rest of the county, not a Mount Vernon-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 9.7 | Very Low |
| Inland Flooding | 59 | Relatively Low |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 95.8 | Relatively Moderate |
| Heat Wave | 81.3 | Relatively Moderate |
| Tornado | 79.1 | Relatively Moderate |
| Avalanche | — | Not Applicable |
| Cold Wave | 63.7 | Relatively Low |
| Drought | 58.3 | Relatively Low |
| Hail | 75.4 | Relatively Moderate |
| Hurricane | 39.1 | Very Low |
| Ice Storm | 43.7 | Relatively Low |
| Landslide | 70.1 | Relatively Low |
| Lightning | 46.1 | Relatively Low |
| Strong Wind | 92.3 | Relatively High |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 86.6 | Relatively High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Jefferson County risk profile for disaster declarations, social vulnerability, and climate projection data.
More on Jefferson County:
Frequently asked questions
What natural hazards is Mount Vernon, IL at risk of?
Mount Vernon is rated Relatively Low for overall natural hazard risk by FEMA's National Risk Index — lower risk than most US counties. The highest-rated hazards for Jefferson County, where Mount Vernon is located, are earthquake, strong wind, and winter weather.
What is Mount Vernon's biggest natural hazard risk?
Earthquake is the highest-rated hazard for Jefferson County, where Mount Vernon is located, scoring 95.8 out of 100 on FEMA's National Risk Index (rated "Relatively Moderate").
Is Mount Vernon a high-risk area for natural disasters?
No — Mount Vernon carries lower risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively Low" for Jefferson County.
Has Mount Vernon had tornadoes, hail, or flooding?
NOAA has recorded 10 tornado, 56 hail, 76 inland flooding events within 25 miles of Mount Vernon since 2016.