Johnson County, Tennessee: hazard risk
FEMA rates Johnson County's overall risk Very Low (score 28.2 of 100, higher than 28% of rated U.S. counties). Its storm record holds 230 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 Moderate | 90.7 | $39K |
| Cold Wave | Relatively Low | 63.0 | $1.0M |
| Lightning | Relatively Low | 48.0 | $137K |
| Drought | Relatively Low | 47.8 | $79K |
| Riverine Flooding | Relatively Low | 47.2 | $3.8M |
| Ice Storm | Relatively Low | 37.3 | $29K |
| Strong Wind | Relatively Low | 36.2 | $228K |
| Winter Weather | Relatively Low | 30.0 | $19K |
| Wildfire | Very Low | 54.9 | $39K |
| Hurricane | Very Low | 51.1 | $51K |
| Earthquake | Very Low | 46.9 | $147K |
| Tornado | Very Low | 25.4 | $236K |
| Hail | Very Low | 14.0 | $29K |
| Heat Wave | Very Low | 2.0 | $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. |
|---|---|---|---|---|---|
| Winter storms | 89 | 1 | $27K | 6th of 95 | 396th of 3,077 |
| Severe thunderstorm wind | 71 | 0 | $831K | 87th of 95 | 1389th of 3,080 |
| Floods | 26 | 1 | $8.5M | 49th of 95 | 1004th of 3,080 |
| Hail | 23 | 0 | $10K | 90th of 95 | 2165th of 3,080 |
| High wind and dust storms | 15 | 0 | $227K | 10th of 95 | 938th of 3,080 |
| Tornadoes | 3 | 2 | $1.7M | 87th of 95 | 2412th of 3,080 |
| Drought | 1 | 0 | – | 71st of 95 | 2296th of 3,063 |
| Heavy rain | 1 | 0 | $7K | 33rd of 95 | 1584th of 3,080 |
| Hurricanes and tropical storms | 1 | 0 | $23K | 16th of 95 | 810th of 1,849 |
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.