Wyoming Natural Disaster Risk by County
Of Wyoming's 23 counties, 0 have a Very High natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025); the highest is Laramie County (score 76.7 of 100), and expected losses across the state total $344 million a year.
OpenFEMA lists 43 federal disaster, emergency and fire management declarations for Wyoming since 1963 (not counting COVID-19); the latest is FM-5608-WY, Red Canyon Fire, declared 15 August 2025.
Live weather alerts for Wyoming Latest FEMA declarations All official warnings
Most exposed counties, hazard by hazard
Top 10 by FEMA hazard risk scoreTornado 23 rated
| # | County | Rating | Loss a year |
|---|---|---|---|
| 1 | Laramie County | Relatively Moderate | $7.3 million |
| 2 | Goshen County | Relatively Low | $1.1 million |
| 3 | Campbell County | Relatively Low | $1.5 million |
| 4 | Natrona County | Relatively Low | $874,676 |
| 5 | Albany County | Relatively Low | $863,369 |
| 6 | Platte County | Relatively Low | $426,649 |
| 7 | Park County | Very Low | $386,431 |
| 8 | Converse County | Very Low | $325,743 |
| 9 | Weston County | Very Low | $328,251 |
| 10 | Sheridan County | Very Low | $302,561 |
Inland flooding 23 rated
| # | County | Rating | Loss a year |
|---|---|---|---|
| 1 | Natrona County | Relatively Moderate | $19 million |
| 2 | Sheridan County | Relatively Moderate | $17 million |
| 3 | Laramie County | Relatively Low | $13 million |
| 4 | Fremont County | Relatively Low | $10 million |
| 5 | Park County | Relatively Low | $9.3 million |
| 6 | Sweetwater County | Relatively Low | $8.2 million |
| 7 | Big Horn County | Relatively Low | $6.2 million |
| 8 | Carbon County | Relatively Low | $6.2 million |
| 9 | Washakie County | Relatively Low | $4.7 million |
| 10 | Albany County | Relatively Low | $6.5 million |
Wildfire 23 rated
| # | County | Rating | Loss a year |
|---|---|---|---|
| 1 | Sheridan County | Relatively Moderate | $2.8 million |
| 2 | Natrona County | Relatively Moderate | $2.7 million |
| 3 | Campbell County | Relatively Moderate | $2.9 million |
| 4 | Fremont County | Relatively Moderate | $1.9 million |
| 5 | Laramie County | Relatively Moderate | $2.1 million |
| 6 | Converse County | Relatively Moderate | $1.5 million |
| 7 | Teton County | Relatively Moderate | $2.1 million |
| 8 | Johnson County | Relatively Low | $958,065 |
| 9 | Sublette County | Relatively Low | $1.1 million |
| 10 | Platte County | Relatively Low | $660,532 |
Earthquake 23 rated
| # | County | Rating | Loss a year |
|---|---|---|---|
| 1 | Lincoln County | Relatively Low | $4.0 million |
| 2 | Teton County | Relatively Low | $4.7 million |
| 3 | Fremont County | Relatively Low | $2.7 million |
| 4 | Natrona County | Relatively Low | $2.6 million |
| 5 | Park County | Relatively Low | $1.4 million |
| 6 | Sublette County | Relatively Low | $1.3 million |
| 7 | Campbell County | Relatively Low | $1.2 million |
| 8 | Washakie County | Relatively Low | $655,841 |
| 9 | Laramie County | Relatively Low | $902,536 |
| 10 | Sweetwater County | Relatively Low | $728,062 |
Every Wyoming county, highest overall risk first
23| # | County | Overall risk | Score | Loss a year | Top hazard | Declarations | Tornadoes |
|---|---|---|---|---|---|---|---|
| 1 | Laramie County | Relatively Low | 76.7 | $42 million | Winter weather | 3 | 124 |
| 2 | Teton County | Relatively Low | 70.6 | $40 million | Avalanche | 3 | 3 |
| 3 | Natrona County | Relatively Low | 68.9 | $33 million | Winter weather | 6 | 39 |
| 4 | Sheridan County | Relatively Low | 65.2 | $26 million | Wildfire | 5 | 11 |
| 5 | Fremont County | Relatively Low | 59.7 | $19 million | Landslide | 4 | 22 |
| 6 | Park County | Relatively Low | 57.7 | $20 million | Landslide | 2 | 10 |
| 7 | Campbell County | Relatively Low | 56.1 | $25 million | Hail | 4 | 95 |
| 8 | Lincoln County | Relatively Low | 51.9 | $18 million | Avalanche | 3 | 6 |
| 9 | Albany County | Relatively Low | 48.5 | $18 million | Winter weather | 8 | 32 |
| 10 | Carbon County | Very Low | 42.7 | $12 million | Avalanche | 3 | 18 |
| 11 | Converse County | Very Low | 31.4 | $9.7 million | Wildfire | 3 | 49 |
| 12 | Big Horn County | Very Low | 31.1 | $8.9 million | Landslide | 2 | 32 |
| 13 | Sweetwater County | Very Low | 30.6 | $12 million | Landslide | 2 | 26 |
| 14 | Goshen County | Very Low | 28.5 | $9.5 million | Hail | 3 | 88 |
| 15 | Platte County | Very Low | 25.7 | $5.9 million | Wildfire | 6 | 50 |
| 16 | Washakie County | Very Low | 24.4 | $6.1 million | Landslide | 3 | 8 |
| 17 | Sublette County | Very Low | 21.6 | $8.1 million | Landslide | 2 | 7 |
| 18 | Johnson County | Very Low | 19.3 | $6.8 million | Wildfire | 5 | 22 |
| 19 | Uinta County | Very Low | 16.7 | $7.9 million | Winter weather | 3 | 3 |
| 20 | Crook County | Very Low | 16.1 | $6.3 million | Wildfire | 5 | 39 |
| 21 | Hot Springs County | Very Low | 16.1 | $4.7 million | Landslide | 2 | 6 |
| 22 | Weston County | Very Low | 7.9 | $4.7 million | Wildfire | 5 | 26 |
| 23 | Niobrara County | Very Low | 3.3 | $1.8 million | Wildfire | 3 | 36 |
Score: FEMA's national percentile (higher = more risk). Declarations: federal declarations that named the county since 1953, not counting COVID-19. Tornadoes: NOAA SPC tornadoes that touched the county, 1950–2025.
Latest federal declarations in Wyoming
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What this page shows, and what it misses
FEMA's National Risk Index compares every US county with every other for 18 natural hazards, combining expected losses with social vulnerability and community resilience. It is a planning-level estimate for nationwide comparison, not a flood-zone map and not the risk to any one property — for flood zones use FEMA's Flood Map Service Center ↗. Federal declarations exclude state declarations and SBA or USDA designations.
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties - v1.20.0 (December 2025). Retrieved from https://services.arcgis.com/XG15cJAlne2vxtgt/ArcGIS/rest/services/National_Risk_Index_Counties/FeatureServer/0/query on November 2, 2026, 1:20 PM EST. This product uses the Federal Emergency Management Agency’s National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Federal Emergency Management Agency (FEMA), OpenFEMA Dataset: Disaster Declarations Summaries - v2, retrieved from https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries on November 2, 2026, 1:21 PM EST. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Tornado records: NOAA/NWS Storm Prediction Center, Severe Weather Database, tornadoes 1950–2025 (https://www.spc.noaa.gov/wcm/data/1950-2025_actual_tornadoes.csv, downloaded 2 November 2026). Public domain; not endorsed by NOAA. Compiled by Global Incident Tracker.
Questions about Wyoming
Which county in Wyoming has the highest natural disaster risk?
Of Wyoming's 23 counties, 0 have a Very High natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025); the highest is Laramie County (score 76.7 of 100), and expected losses across the state total $344 million a year.
Which Wyoming counties are most at risk from tornadoes?
By FEMA's National Risk Index tornado risk score: Laramie County, Goshen County, Campbell County. These are planning-level estimates for whole counties, not maps of individual properties.
Which Wyoming counties are most at risk from inland flooding?
By FEMA's National Risk Index inland flooding risk score: Natrona County, Sheridan County, Laramie County. These are planning-level estimates for whole counties, not maps of individual properties.
How many FEMA disaster declarations has Wyoming had?
OpenFEMA lists 43 federal disaster, emergency and fire management declarations for Wyoming since 1963 (not counting COVID-19); the latest is FM-5608-WY, Red Canyon Fire, declared 15 August 2025.