Lemhi County, Idaho: hazard risk
FEMA rates Lemhi County's overall risk Very Low (score 41.4 of 100, higher than 41% of rated U.S. counties). Its storm record holds 350 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 Moderate | 95.7 | $139K |
| Wildfire | Relatively Moderate | 93.2 | $2.0M |
| Lightning | Relatively Moderate | 78.3 | $591K |
| Riverine Flooding | Relatively Low | 59.8 | $7.9M |
| Cold Wave | Relatively Low | 30.7 | $383K |
| Avalanche | Very Low | 60.1 | $1K |
| Earthquake | Very Low | 53.5 | $288K |
| Winter Weather | Very Low | 21.9 | $17K |
| Drought | Very Low | 14.4 | $355 |
| Volcanic Activity | Very Low | 13.0 | $0 |
| Heat Wave | Very Low | 12.5 | $23K |
| Ice Storm | Very Low | 6.9 | $3K |
| Hail | Very Low | 4.8 | $10K |
| Strong Wind | Very Low | 4.3 | $25K |
| Tornado | Very Low | 3.1 | $7K |
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 | 149 | 0 | $11K | 43rd of 44 | 2594th of 3,077 |
| Severe thunderstorm wind | 57 | 0 | $179K | 38th of 44 | 2861st of 3,080 |
| High wind and dust storms | 37 | 0 | $763K | 39th of 44 | 2586th of 3,080 |
| Hail | 32 | 0 | $645K | 40th of 44 | 2927th of 3,080 |
| Floods | 27 | 0 | $83M | 36th of 44 | 2913th of 3,080 |
| Extreme cold | 18 | 0 | – | 28th of 44 | 2564th of 3,076 |
| Landslides and avalanches | 12 | 0 | $5K | 22nd of 44 | 258th of 2,278 |
| Heavy rain | 8 | 0 | – | 31st of 44 | 2137th of 3,080 |
| Tornadoes | 3 | 0 | $657K | 35th of 44 | 2941st of 3,080 |
| Heat | 2 | 0 | – | 31st of 44 | 2498th of 3,076 |
| Lightning | 2 | 1 | – | 21st of 44 | 2364th of 3,080 |
| Wildfires | 2 | 2 | – | 39th of 44 | 1246th of 2,972 |
Source: NOAA NCEI Storm Events Database, 1950 to 2026-06-30; damage in 2025 dollars. Search the record at NCEI.
The full Lemhi County record: every hazard by year and month, the deadliest events and FEMA's declarations.