Coastal Flood Risk in Washington
All Washington counties ranked by FEMA National Risk Index coastal flood score
Coastal Flood risk — seawater inundation from storm surge, high tides, and rising sea levels — is rated for 18 of 39 Washington counties in FEMA's National Risk Index. Grays Harbor County carries the state's highest coastal flood score at 99.0, with $24M in expected annual coastal flood losses.
2 Washington counties are rated High or Very High for coastal flood, and expected annual losses from coastal flood total roughly $47M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Coastal Flood
| # | County | Coastal Flood Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Grays Harbor County | Very High | 10.13 / yr | $24M | |
| 2 | Skagit County | High | 3.36 / yr | $7M | |
| 3 | Kitsap County | Medium | 3.18 / yr | $3M | |
| 4 | Snohomish County | Medium | 3.18 / yr | $2M | |
| 5 | Mason County | Medium | 3.15 / yr | $1M | |
| 6 | Pacific County | Medium | 6.60 / yr | $1M | |
| 7 | Island County | Medium | 3.20 / yr | $1M | |
| 8 | Pierce County | Medium | 3.12 / yr | $1M | |
| 9 | King County | Medium | 3.18 / yr | $1M | |
| 10 | Wahkiakum County | Medium | 4.36 / yr | $931K | |
| 11 | Jefferson County | Medium | 3.38 / yr | $515K | |
| 12 | Whatcom County | Medium | 3.63 / yr | $794K | |
| 13 | Thurston County | Low | 3.10 / yr | $479K | |
| 14 | San Juan County | Low | 3.63 / yr | $354K | |
| 15 | Clallam County | Low | 3.62 / yr | $244K | |
| 16 | Cowlitz County | Low | 1.62 / yr | $152K | |
| 17 | Clark County | Very Low | 0.23 / yr | $6K | |
| 18 | Skamania County | Very Low | 0.18 / yr | $33 |
18 Washington counties with measurable coastal flood risk. See the national coastal flood ranking or all Washington counties by overall risk.
Frequently Asked Questions
Which Washington county has the highest coastal flood risk?
Grays Harbor County has the highest FEMA coastal flood risk score in Washington at 99.0 (Very High), with $24M in expected annual losses and about 10.13 events per year.
How many Washington counties face significant coastal flood risk?
18 Washington counties record measurable coastal flood risk in FEMA's National Risk Index; 2 of them are rated High or Very High.