Napa County, California: hazard risk
FEMA rates Napa County's overall risk Relatively High (score 95.3 of 100, higher than 95% of rated U.S. counties); 4 of its 16 hazards are rated Relatively High or Very High, led by drought, landslide, earthquake. Its storm record holds 511 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 | Very High | 99.5 | $21M |
| Landslide | Relatively High | 98.7 | $1.1M |
| Earthquake | Relatively High | 98.4 | $67M |
| Riverine Flooding | Relatively High | 95.8 | $90M |
| Wildfire | Relatively Moderate | 96.0 | $4.9M |
| Coastal Flooding | Relatively Moderate | 68.2 | $987K |
| Heat Wave | Relatively Low | 66.8 | $794K |
| Lightning | Relatively Low | 30.2 | $110K |
| Volcanic Activity | Very Low | 60.3 | $33 |
| Tornado | Very Low | 18.3 | $211K |
| Avalanche | Very Low | 9.2 | $7 |
| Hail | Very Low | 8.5 | $25K |
| Strong Wind | Very Low | 8.3 | $61K |
| Winter Weather | Very Low | 4.2 | $3K |
| Tsunami | Very Low | 3.1 | $3K |
| Cold Wave | No Rating | 0.0 | $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. |
|---|---|---|---|---|---|
| High wind and dust storms | 298 | 6 | $9.3M | 8th of 57 | 135th of 3,080 |
| Floods | 70 | 1 | $216M | 8th of 57 | 1105th of 3,080 |
| Heat | 26 | 4 | $19 | 18th of 57 | 787th of 3,076 |
| Landslides and avalanches | 24 | 1 | $69M | 6th of 57 | 34th of 2,278 |
| Wildfires | 24 | 3 | $646K | 13th of 57 | 73rd of 2,972 |
| Extreme cold | 17 | 1 | $4.3M | 22nd of 57 | 1343rd of 3,076 |
| Heavy rain | 12 | 0 | $304K | 28th of 57 | 832nd of 3,080 |
| Hail | 7 | 0 | $623 | 14th of 57 | 2850th of 3,080 |
| Severe thunderstorm wind | 4 | 0 | $9 | 21st of 57 | 2933rd of 3,080 |
| Winter storms | 3 | 0 | $82K | 44th of 57 | 2990th of 3,077 |
| Lightning | 1 | 0 | – | 23rd of 57 | 2129th of 3,080 |
| Tornadoes | 1 | 0 | – | 39th of 57 | 2884th 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 Napa County record: every hazard by year and month, the deadliest events and FEMA's declarations.