Boone County, Illinois: hazard risk
FEMA rates Boone County's overall risk Relatively Low (score 57.3 of 100, higher than 57% of rated U.S. counties). Its storm record holds 419 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 |
|---|---|---|---|
| Hail | Relatively Moderate | 79.6 | $933K |
| Tornado | Relatively Moderate | 77.6 | $3.8M |
| Cold Wave | Relatively Moderate | 76.3 | $3.2M |
| Lightning | Relatively Moderate | 68.6 | $515K |
| Strong Wind | Relatively Moderate | 59.9 | $800K |
| Riverine Flooding | Relatively Low | 63.9 | $11M |
| Drought | Relatively Low | 49.5 | $153K |
| Heat Wave | Relatively Low | 46.8 | $350K |
| Winter Weather | Relatively Low | 41.1 | $52K |
| Ice Storm | Relatively Low | 32.2 | $40K |
| Earthquake | Very Low | 45.6 | $234K |
| Landslide | Very Low | 28.1 | $291 |
| Hurricane | Very Low | 8.8 | $2K |
| Wildfire | Very Low | 8.3 | $3K |
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 | 143 | 0 | $815K | 7th of 102 | 398th of 3,080 |
| Winter storms | 77 | 0 | – | 20th of 102 | 416th of 3,077 |
| Hail | 65 | 0 | $312K | 30th of 102 | 773rd of 3,080 |
| Floods | 35 | 0 | $309K | 30th of 102 | 645th of 3,080 |
| Tornadoes | 25 | 25 | $12M | 17th of 102 | 252nd of 3,080 |
| Extreme cold | 23 | 0 | – | 24th of 102 | 222nd of 3,076 |
| Drought | 22 | 0 | – | 14th of 102 | 511th of 3,063 |
| High wind and dust storms | 13 | 0 | $68K | 30th of 102 | 950th of 3,080 |
| Heat | 8 | 0 | – | 58th of 102 | 800th of 3,076 |
| Heavy rain | 5 | 0 | – | 22nd of 102 | 527th of 3,080 |
| Lightning | 2 | 1 | $7K | 28th of 102 | 955th 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 Boone County record: every hazard by year and month, the deadliest events and FEMA's declarations.