Snohomish County, Washington: hazard risk
FEMA rates Snohomish County's overall risk Relatively High (score 97.9 of 100, higher than 97% of rated U.S. counties); 8 of its 17 hazards are rated Relatively High or Very High, led by landslide, ice storm, earthquake. Its storm record holds 542 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 | Very High | 100.0 | $25M |
| Ice Storm | Very High | 98.0 | $3.6M |
| Earthquake | Relatively High | 99.3 | $247M |
| Heat Wave | Relatively High | 96.9 | $12M |
| Riverine Flooding | Relatively High | 95.7 | $112M |
| Winter Weather | Relatively High | 94.0 | $761K |
| Avalanche | Relatively High | 87.4 | $1.7M |
| Lightning | Relatively High | 86.1 | $1.3M |
| Volcanic Activity | Relatively Moderate | 96.4 | $675K |
| Coastal Flooding | Relatively Moderate | 77.6 | $2.4M |
| Cold Wave | Relatively Low | 64.4 | $2.2M |
| Tornado | Relatively Low | 38.8 | $1.0M |
| Wildfire | Very Low | 61.5 | $120K |
| Hail | Very Low | 15.1 | $66K |
| Drought | Very Low | 13.0 | $44 |
| Strong Wind | Very Low | 7.8 | $74K |
| Tsunami | Very Low | 7.7 | $51K |
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 | 261 | 2 | $16M | 18th of 39 | 1580th of 3,077 |
| High wind and dust storms | 143 | 16 | $64M | 23rd of 39 | 956th of 3,080 |
| Floods | 46 | 0 | $43M | 12th of 39 | 2545th of 3,080 |
| Landslides and avalanches | 27 | 54 | $83M | 6th of 39 | 73rd of 2,278 |
| Heat | 16 | 2 | – | 20th of 39 | 1900th of 3,076 |
| Lightning | 9 | 1 | $112K | 5th of 39 | 1348th of 3,080 |
| Drought | 8 | 0 | – | 15th of 39 | 2443rd of 3,063 |
| Tornadoes | 7 | 0 | $381K | 9th of 39 | 2722nd of 3,080 |
| Severe thunderstorm wind | 5 | 0 | $47K | 26th of 39 | 2994th of 3,080 |
| Heavy rain | 4 | 0 | $14M | 22nd of 39 | 1942nd of 3,080 |
| Hail | 3 | 0 | $76K | 26th of 39 | 3007th of 3,080 |
| Hurricanes and tropical storms | 2 | 0 | – | 7th of 39 | 1041st of 1,849 |
| Extreme cold | 1 | 1 | – | 33rd of 39 | 2851st of 3,076 |
| Wildfires | 1 | 0 | $5.4M | 33rd of 39 | 1237th of 2,972 |
Source: NOAA NCEI Storm Events Database, 1950 to 2026-06-30; damage in 2025 dollars. Search the record at NCEI.
The full Snohomish County record: every hazard by year and month, the deadliest events and FEMA's declarations.