Jefferson County, Idaho: hazard risk
FEMA rates Jefferson County's overall risk Very Low (score 40.1 of 100, higher than 40% of rated U.S. counties). Its storm record holds 632 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 |
|---|---|---|---|
| Winter Weather | Relatively Moderate | 82.7 | $329K |
| Cold Wave | Relatively Moderate | 81.8 | $5.6M |
| Heat Wave | Relatively Moderate | 79.1 | $2.0M |
| Earthquake | Relatively Low | 80.6 | $2.4M |
| Lightning | Relatively Low | 54.7 | $381K |
| Riverine Flooding | Relatively Low | 37.1 | $6.0M |
| Wildfire | Very Low | 62.5 | $138K |
| Volcanic Activity | Very Low | 58.3 | $37 |
| Landslide | Very Low | 34.5 | $596 |
| Drought | Very Low | 22.2 | $9K |
| Hail | Very Low | 20.6 | $100K |
| Strong Wind | Very Low | 12.4 | $133K |
| Ice Storm | Very Low | 10.9 | $8K |
| Tornado | Very Low | 7.0 | $47K |
| Avalanche | Very Low | 1.9 | $0 |
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. |
|---|---|---|---|---|---|
| Severe thunderstorm wind | 181 | 0 | $2.0M | 3rd of 44 | 2394th of 3,080 |
| High wind and dust storms | 156 | 0 | $6.4M | 2nd of 44 | 283rd of 3,080 |
| Winter storms | 155 | 8 | $1.8M | 21st of 44 | 1188th of 3,077 |
| Wildfires | 30 | 0 | $37K | 11th of 44 | 84th of 2,972 |
| Hail | 29 | 0 | $12K | 11th of 44 | 2726th of 3,080 |
| Extreme cold | 28 | 1 | – | 3rd of 44 | 1061st of 3,076 |
| Floods | 18 | 0 | $3.8M | 11th of 44 | 2467th of 3,080 |
| Tornadoes | 18 | 0 | $339K | 1st of 44 | 2202nd of 3,080 |
| Heat | 7 | 1 | – | 3rd of 44 | 1770th of 3,076 |
| Drought | 2 | 0 | – | 4th of 44 | 2404th of 3,063 |
| Heavy rain | 1 | 0 | $5.0M | 37th of 44 | 2255th of 3,080 |
| Lightning | 1 | 0 | $1K | 17th of 44 | 2270th 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 Jefferson County record: every hazard by year and month, the deadliest events and FEMA's declarations.