Mason County, Illinois: hazard risk
FEMA rates Mason County's overall risk Relatively Low (score 43.0 of 100, higher than 43% of rated U.S. counties). Its storm record holds 384 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 |
|---|---|---|---|
| Drought | Relatively Moderate | 86.9 | $1.2M |
| Strong Wind | Relatively Moderate | 73.8 | $985K |
| Cold Wave | Relatively Moderate | 68.6 | $1.8M |
| Earthquake | Relatively Low | 63.8 | $510K |
| Hail | Relatively Low | 63.7 | $392K |
| Heat Wave | Relatively Low | 57.4 | $473K |
| Tornado | Relatively Low | 52.1 | $1.2M |
| Riverine Flooding | Relatively Low | 47.2 | $5.5M |
| Ice Storm | Relatively Low | 45.5 | $63K |
| Winter Weather | Relatively Low | 29.5 | $26K |
| Landslide | Very Low | 36.9 | $480 |
| Hurricane | Very Low | 23.2 | $7K |
| Lightning | Very Low | 16.8 | $52K |
| Wildfire | Very Low | 1.6 | $584 |
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 | 153 | 0 | $24M | 62nd of 102 | 1300th of 3,080 |
| Hail | 56 | 0 | – | 94th of 102 | 2043rd of 3,080 |
| Winter storms | 55 | 0 | $105K | 62nd of 102 | 1468th of 3,077 |
| Tornadoes | 42 | 1 | $33M | 26th of 102 | 349th of 3,080 |
| Floods | 28 | 1 | $6.3M | 87th of 102 | 1553rd of 3,080 |
| Drought | 15 | 0 | $38M | 46th of 102 | 1401st of 3,063 |
| Heat | 14 | 0 | – | 62nd of 102 | 857th of 3,076 |
| Extreme cold | 9 | 0 | – | 70th of 102 | 1297th of 3,076 |
| High wind and dust storms | 9 | 0 | $6K | 80th of 102 | 1968th of 3,080 |
| Lightning | 2 | 0 | $212K | 53rd of 102 | 1464th 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 Mason County record: every hazard by year and month, the deadliest events and FEMA's declarations.