Coastal Flood Risk in Alaska
All Alaska 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 7 of 30 Alaska counties in FEMA's National Risk Index. Juneau City and Borough carries the state's highest coastal flood score at 38.0, with $14K in expected annual coastal flood losses.
No Alaska county reaches the High band for coastal flood, and expected annual losses from coastal flood total roughly $36K 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 | Juneau City and Borough | Very Low | 0.01 / yr | $14K | |
| 2 | Sitka City and Borough | Very Low | 0.01 / yr | $7K | |
| 3 | Kenai Peninsula Borough | Very Low | 0.01 / yr | $7K | |
| 4 | Anchorage Municipality | Very Low | 0.01 / yr | $4K | |
| 5 | Ketchikan Gateway Borough | Very Low | 0.01 / yr | $3K | |
| 6 | Hoonah-Angoon Census Area | Very Low | 0.01 / yr | $593 | |
| 7 | Chugach Census Area | Very Low | 0.01 / yr | $558 |
7 Alaska counties with measurable coastal flood risk. See the national coastal flood ranking or all Alaska counties by overall risk.
Frequently Asked Questions
Which Alaska county has the highest coastal flood risk?
Juneau City and Borough has the highest FEMA coastal flood risk score in Alaska at 38.0 (Very Low), with $14K in expected annual losses and about 0.01 events per year.
How many Alaska counties face significant coastal flood risk?
7 Alaska counties record measurable coastal flood risk in FEMA's National Risk Index; 0 of them are rated High or Very High.