Big Horn County, Wyoming: hazard risk
FEMA rates Big Horn County's overall risk Very Low (score 31.1 of 100, higher than 31% of rated U.S. counties); 1 of its 15 hazards are rated Relatively High or Very High, led by landslide. Its storm record holds 394 events since 1950.
FEMA's rating for each hazard
These are FEMA's county-wide model ratings and this county's storm record. They are not an assessment of any property, address or building, and not insurance advice: a property's risk depends on its own elevation, construction and location.
FEMA gives each hazard its own rating, and a rating does not follow the score from one hazard to the next: a hazard with a higher score can carry a lower rating than another. The table sorts by FEMA's rating, then by score (0 to 100, the county against every other county for that hazard).
| Hazard | Risk rating | Score | Expected annual loss |
|---|---|---|---|
| Landslide | Relatively High | 97.9 | $493K |
| Earthquake | Relatively Low | 61.4 | $425K |
| Cold Wave | Relatively Low | 57.9 | $1.1M |
| Riverine Flooding | Relatively Low | 52.4 | $6.2M |
| Winter Weather | Relatively Low | 45.9 | $49K |
| Drought | Relatively Low | 39.3 | $54K |
| Lightning | Relatively Low | 37.0 | $126K |
| Wildfire | Very Low | 61.4 | $81K |
| Volcanic Activity | Very Low | 33.2 | $3 |
| Avalanche | Very Low | 32.3 | $110 |
| Hail | Very Low | 26.6 | $88K |
| Tornado | Very Low | 16.7 | $155K |
| Strong Wind | Very Low | 12.0 | $80K |
| Ice Storm | Very Low | 8.9 | $4K |
| Heat Wave | Very Low | 8.8 | $12K |
Source: FEMA National Risk Index, December 2025 release. A model of future loss, not a count of past events. FEMA's National Risk Index map.
What the record holds
| Hazard | Records | Deaths | Damage | Rank in state | Rank in U.S. |
|---|---|---|---|---|---|
| Winter storms | 94 | 2 | $19K | 21st of 23 | 2568th of 3,077 |
| Severe thunderstorm wind | 87 | 0 | $381K | 10th of 23 | 2744th of 3,080 |
| Hail | 62 | 0 | $591K | 15th of 23 | 2817th of 3,080 |
| High wind and dust storms | 47 | 1 | $28K | 19th of 23 | 2095th of 3,080 |
| Tornadoes | 33 | 1 | $1.9M | 8th of 23 | 2489th of 3,080 |
| Floods | 30 | 0 | $3.3M | 5th of 23 | 2792nd of 3,080 |
| Extreme cold | 14 | 0 | – | 12th of 23 | 2462nd of 3,076 |
| Wildfires | 7 | 0 | $149K | 9th of 23 | 830th of 2,972 |
| Heat | 6 | 0 | – | 2nd of 23 | 2205th of 3,076 |
| Landslides and avalanches | 3 | 0 | $527K | 7th of 23 | 346th of 2,278 |
| Lightning | 1 | 0 | – | 16th of 23 | 2393rd of 3,080 |
Source: NOAA NCEI Storm Events Database, 1950 to 2026-06-30; damage in 2025 dollars. Search the record at NCEI.
The full Big Horn County record: every hazard by year and month, the deadliest events and FEMA's declarations.