Green River, WY
Local storm history & FEMA National Risk Index data
Green River is rated Very Low for overall natural hazard risk — among the lowest-risk counties in the country — based on FEMA's National Risk Index for Sweetwater County, WY. The county's highest-rated hazards are landslide, winter weather, and wildfire.
Storm events near Green River
NOAA-recorded tornado, hail, and flood events within 25 miles of Green River's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Green River 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 Sweetwater County's FEMA National Risk Index scores, covering Green River along with the rest of the county, not a Green River-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 66.2 | Relatively Low |
| Inland Flooding | 52.4 | Relatively Low |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 65.6 | Relatively Low |
| Heat Wave | 0 | No Rating |
| Tornado | 9.4 | Very Low |
| Avalanche | 12.6 | Very Low |
| Cold Wave | 58.2 | Relatively Low |
| Drought | 19.6 | Very Low |
| Hail | 14.4 | Very Low |
| Hurricane | — | Not Applicable |
| Ice Storm | 16.1 | Very Low |
| Landslide | 90.6 | Relatively Moderate |
| Lightning | 55.9 | Relatively Low |
| Strong Wind | 10.2 | Very Low |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 85.6 | Relatively High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Sweetwater County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Sweetwater County:
More on Sweetwater County:
Frequently asked questions
What natural hazards is Green River, WY at risk of?
Green River is rated Very Low for overall natural hazard risk by FEMA's National Risk Index — among the lowest-risk counties in the country. The highest-rated hazards for Sweetwater County, where Green River is located, are landslide, winter weather, and wildfire.
What is Green River's biggest natural hazard risk?
Landslide is the highest-rated hazard for Sweetwater County, where Green River is located, scoring 90.6 out of 100 on FEMA's National Risk Index (rated "Relatively Moderate").
Is Green River a high-risk area for natural disasters?
No — Green River carries among the lowest-risk counties in the country for overall natural hazard risk, per FEMA's National Risk Index rating of "Very Low" for Sweetwater County.
Has Green River had tornadoes, hail, or flooding?
NOAA has recorded 1 tornado, 2 hail, 2 inland flooding events within 25 miles of Green River since 2016.