Brown County, Illinois: hazard risk
FEMA rates Brown County's overall risk Very Low (score 4.7 of 100, higher than 4% of rated U.S. counties). Its storm record holds 261 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 Low | 78.6 | $15K |
| Heat Wave | Relatively Low | 62.6 | $686K |
| Drought | Relatively Low | 54.9 | $216K |
| Cold Wave | Relatively Low | 48.2 | $922K |
| Strong Wind | Relatively Low | 25.0 | $249K |
| Earthquake | Very Low | 28.0 | $64K |
| Hail | Very Low | 22.8 | $87K |
| Tornado | Very Low | 17.7 | $206K |
| Ice Storm | Very Low | 16.0 | $11K |
| Winter Weather | Very Low | 12.0 | $10K |
| Lightning | Very Low | 12.0 | $43K |
| Hurricane | Very Low | 9.1 | $2K |
| Riverine Flooding | Very Low | 4.1 | $653K |
| Wildfire | Very Low | 0.2 | $84 |
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 | 68 | 0 | $395K | 74th of 102 | 1477th of 3,080 |
| Hail | 52 | 0 | $110K | 45th of 102 | 1073rd of 3,080 |
| Winter storms | 52 | 0 | – | 41st of 102 | 876th of 3,077 |
| Heat | 40 | 0 | – | 21st of 102 | 213th of 3,076 |
| Floods | 18 | 1 | $96K | 76th of 102 | 1327th of 3,080 |
| Tornadoes | 10 | 0 | $26M | 89th of 102 | 1401st of 3,080 |
| Extreme cold | 8 | 0 | – | 50th of 102 | 930th of 3,076 |
| High wind and dust storms | 8 | 0 | $4K | 56th of 102 | 1542nd of 3,080 |
| Drought | 5 | 0 | – | 73rd of 102 | 1768th of 3,063 |
Source: NOAA NCEI Storm Events Database, 1950 to 2026-06-30; damage in 2025 dollars. Search the record at NCEI.
The full Brown County record: every hazard by year and month, the deadliest events and FEMA's declarations.