Marin County, California: hazard risk
FEMA rates Marin County's overall risk Relatively High (score 96.4 of 100, higher than 96% of rated U.S. counties); 4 of its 15 hazards are rated Relatively High or Very High, led by coastal flooding, landslide, earthquake. Its storm record holds 753 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 |
|---|---|---|---|
| Coastal Flooding | Very High | 97.2 | $20M |
| Landslide | Relatively High | 99.2 | $1.9M |
| Earthquake | Relatively High | 98.7 | $110M |
| Riverine Flooding | Relatively High | 96.5 | $116M |
| Wildfire | Relatively Moderate | 94.6 | $3.6M |
| Tsunami | Relatively Moderate | 69.2 | $6.4M |
| Heat Wave | Relatively Low | 74.6 | $1.3M |
| Drought | Relatively Low | 51.6 | $183K |
| Lightning | Relatively Low | 34.1 | $146K |
| Volcanic Activity | Very Low | 63.5 | $56 |
| Tornado | Very Low | 18.6 | $242K |
| Strong Wind | Very Low | 11.2 | $96K |
| Winter Weather | Very Low | 4.0 | $3K |
| Hail | Very Low | 3.7 | $9K |
| 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 | 403 | 16 | $21M | 2nd of 57 | 58th of 3,080 |
| Floods | 153 | 1 | $331M | 1st of 57 | 237th of 3,080 |
| Landslides and avalanches | 32 | 1 | $71M | 2nd of 57 | 17th of 2,278 |
| Heat | 30 | 9 | $19 | 10th of 57 | 573rd of 3,076 |
| Rip currents and high surf | 27 | 25 | $101K | 4th of 57 | 40th of 2,080 |
| Wildfires | 26 | 3 | $646K | 4th of 57 | 30th of 2,972 |
| Extreme cold | 17 | 1 | $4.3M | 18th of 57 | 1019th of 3,076 |
| Hail | 12 | 0 | $577 | 2nd of 57 | 2723rd of 3,080 |
| Heavy rain | 10 | 2 | $425K | 13th of 57 | 480th of 3,080 |
| Hurricanes and tropical storms | 5 | 0 | $1.2M | 1st of 57 | 492nd of 1,849 |
| Winter storms | 5 | 2 | $82K | 40th of 57 | 2922nd of 3,077 |
| Severe thunderstorm wind | 4 | 0 | – | 15th of 57 | 2887th of 3,080 |
| Lightning | 2 | 0 | $42K | 10th of 57 | 1441st of 3,080 |
| Tornadoes | 1 | 0 | $386K | 35th of 57 | 2827th 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 Marin County record: every hazard by year and month, the deadliest events and FEMA's declarations.