Grantsville, UT
Local storm history & FEMA National Risk Index data
Grantsville is rated Relatively Low for overall natural hazard risk — lower risk than most US counties — based on FEMA's National Risk Index for Tooele County, UT. The county's highest-rated hazards are wildfire, winter weather, and earthquake.
Storm events near Grantsville
NOAA-recorded tornado, hail, and flood events within 25 miles of Grantsville's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Grantsville 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 Tooele County's FEMA National Risk Index scores, covering Grantsville along with the rest of the county, not a Grantsville-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 97.3 | Relatively Moderate |
| Inland Flooding | 18.3 | Very Low |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 83.6 | Relatively Low |
| Heat Wave | 53.9 | Relatively Low |
| Tornado | 13.6 | Very Low |
| Avalanche | 55.7 | Very Low |
| Cold Wave | 3.5 | Very Low |
| Drought | 34.6 | Relatively Low |
| Hail | 11.5 | Very Low |
| Hurricane | — | Not Applicable |
| Ice Storm | 14.7 | Very Low |
| Landslide | 33.7 | Very Low |
| Lightning | 79.1 | Relatively Moderate |
| Strong Wind | 66.5 | Relatively Moderate |
| Tsunami | — | Not Applicable |
| Volcanic Activity | 14.3 | Very Low |
| Winter Weather | 95.1 | Relatively High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Tooele County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Tooele County:
More on Tooele County:
Frequently asked questions
What natural hazards is Grantsville, UT at risk of?
Grantsville 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 Tooele County, where Grantsville is located, are wildfire, winter weather, and earthquake.
What is Grantsville's biggest natural hazard risk?
Wildfire is the highest-rated hazard for Tooele County, where Grantsville is located, scoring 97.3 out of 100 on FEMA's National Risk Index (rated "Relatively Moderate").
Is Grantsville a high-risk area for natural disasters?
No — Grantsville carries lower risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively Low" for Tooele County.
Has Grantsville had tornadoes, hail, or flooding?
NOAA has recorded 14 hail, 15 inland flooding events within 25 miles of Grantsville since 2016.