Mariposa County, California: hazard risk
FEMA rates Mariposa County's overall risk Relatively Moderate (score 86.4 of 100, higher than 86% of rated U.S. counties); 3 of its 14 hazards are rated Relatively High or Very High, led by landslide, wildfire, heat wave. Its storm record holds 2,107 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 High | 99.5 | $1.7M |
| Wildfire | Relatively High | 99.0 | $15M |
| Heat Wave | Relatively High | 98.4 | $11M |
| Winter Weather | Relatively Moderate | 77.1 | $113K |
| Drought | Relatively Moderate | 75.5 | $448K |
| Lightning | Relatively Moderate | 69.2 | $302K |
| Riverine Flooding | Relatively Low | 70.8 | $8.4M |
| Earthquake | Relatively Low | 67.5 | $433K |
| Volcanic Activity | Very Low | 58.6 | $17 |
| Avalanche | Very Low | 40.5 | $171 |
| Strong Wind | Very Low | 10.8 | $50K |
| Hail | Very Low | 6.6 | $12K |
| Tornado | Very Low | 6.4 | $18K |
| 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. |
|---|---|---|---|---|---|
| Winter storms | 618 | 4 | $9.6M | 8th of 57 | 470th of 3,077 |
| High wind and dust storms | 265 | 1 | $237M | 19th of 57 | 358th of 3,080 |
| Drought | 198 | 0 | – | 8th of 57 | 1011th of 3,063 |
| Extreme cold | 185 | 0 | $541M | 2nd of 57 | 129th of 3,076 |
| Wildfires | 131 | 3 | $80M | 1st of 57 | 6th of 2,972 |
| Floods | 118 | 2 | $7.5M | 12th of 57 | 1531st of 3,080 |
| Heat | 114 | 32 | $329M | 5th of 57 | 501st of 3,076 |
| Heavy rain | 60 | 3 | $436K | 7th of 57 | 256th of 3,080 |
| Landslides and avalanches | 45 | 2 | $1.0M | 8th of 57 | 40th of 2,278 |
| Severe thunderstorm wind | 17 | 2 | $344K | 9th of 57 | 2840th of 3,080 |
| Hail | 10 | 0 | – | 18th of 57 | 2867th of 3,080 |
| Lightning | 9 | 0 | $222K | 2nd of 57 | 1064th of 3,080 |
| Tornadoes | 3 | 0 | – | 32nd of 57 | 2814th 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 Mariposa County record: every hazard by year and month, the deadliest events and FEMA's declarations.