Mason County, Washington: hazard risk
FEMA rates Mason County's overall risk Relatively Moderate (score 85.3 of 100, higher than 85% of rated U.S. counties); 1 of its 17 hazards are rated Relatively High or Very High, led by landslide. Its storm record holds 265 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 | 98.1 | $500K |
| Earthquake | Relatively Moderate | 97.2 | $26M |
| Riverine Flooding | Relatively Moderate | 79.3 | $15M |
| Coastal Flooding | Relatively Moderate | 75.2 | $1.3M |
| Heat Wave | Relatively Low | 68.0 | $653K |
| Winter Weather | Relatively Low | 48.0 | $47K |
| Volcanic Activity | Very Low | 48.2 | $8 |
| Wildfire | Very Low | 44.1 | $26K |
| Tsunami | Very Low | 43.1 | $433K |
| Avalanche | Very Low | 41.4 | $225 |
| Ice Storm | Very Low | 26.0 | $19K |
| Lightning | Very Low | 20.3 | $54K |
| Tornado | Very Low | 13.8 | $94K |
| Drought | Very Low | 12.6 | $5 |
| Strong Wind | Very Low | 6.3 | $33K |
| Hail | Very Low | 2.8 | $4K |
| 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 | 108 | 1 | $1.6M | 20th of 39 | 1716th of 3,077 |
| High wind and dust storms | 93 | 5 | $24M | 13th of 39 | 587th of 3,080 |
| Floods | 33 | 1 | $2.9M | 4th of 39 | 2222nd of 3,080 |
| Heavy rain | 8 | 0 | $28M | 9th of 39 | 987th of 3,080 |
| Drought | 6 | 0 | – | 7th of 39 | 2388th of 3,063 |
| Landslides and avalanches | 6 | 5 | $865K | 11th of 39 | 125th of 2,278 |
| Heat | 5 | 0 | – | 24th of 39 | 2077th of 3,076 |
| Lightning | 2 | 0 | $131K | 10th of 39 | 1884th of 3,080 |
| Wildfires | 2 | 0 | $2.4M | 25th of 39 | 869th of 2,972 |
| Hail | 1 | 0 | – | 29th of 39 | 3016th of 3,080 |
| Tornadoes | 1 | 0 | $173K | 23rd of 39 | 2907th 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 Mason County record: every hazard by year and month, the deadliest events and FEMA's declarations.