Johnson County, Illinois: hazard risk
FEMA rates Johnson County's overall risk Relatively Low (score 51.1 of 100, higher than 51% of rated U.S. counties). Its storm record holds 719 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 |
|---|---|---|---|
| Earthquake | Relatively Moderate | 91.0 | $4.4M |
| Strong Wind | Relatively Moderate | 68.8 | $676K |
| Ice Storm | Relatively Moderate | 68.4 | $145K |
| Winter Weather | Relatively Moderate | 64.6 | $76K |
| Heat Wave | Relatively Low | 68.9 | $623K |
| Hail | Relatively Low | 66.5 | $346K |
| Cold Wave | Relatively Low | 64.0 | $1.2M |
| Tornado | Relatively Low | 56.0 | $1.1M |
| Drought | Relatively Low | 52.5 | $125K |
| Riverine Flooding | Relatively Low | 37.9 | $3.2M |
| Lightning | Relatively Low | 33.8 | $91K |
| Landslide | Very Low | 44.0 | $636 |
| Hurricane | Very Low | 38.1 | $19K |
| Wildfire | Very Low | 11.3 | $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. |
|---|---|---|---|---|---|
| Winter storms | 113 | 0 | $1.6M | 11th of 102 | 273rd of 3,077 |
| Severe thunderstorm wind | 96 | 0 | $1.9M | 36th of 102 | 991st of 3,080 |
| Hail | 88 | 0 | $12M | 9th of 102 | 362nd of 3,080 |
| Heat | 86 | 0 | – | 8th of 102 | 46th of 3,076 |
| Extreme cold | 76 | 0 | $4.3M | 8th of 102 | 33rd of 3,076 |
| High wind and dust storms | 64 | 0 | $2.1M | 12th of 102 | 144th of 3,080 |
| Drought | 32 | 0 | $4.9M | 9th of 102 | 363rd of 3,063 |
| Floods | 26 | 1 | $2.6M | 61st of 102 | 1120th of 3,080 |
| Tornadoes | 21 | 0 | $8.6M | 57th of 102 | 857th of 3,080 |
| Heavy rain | 4 | 0 | – | 31st of 102 | 774th 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 Johnson County record: every hazard by year and month, the deadliest events and FEMA's declarations.