Coastal Flood Risk in Hawaii
All Hawaii 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 5 of 5 Hawaii counties in FEMA's National Risk Index. Honolulu County carries the state's highest coastal flood score at 75.6, with $2M in expected annual coastal flood losses.
No Hawaii county reaches the High band for coastal flood, and expected annual losses from coastal flood total roughly $2M 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 | Honolulu County | Medium | 0.35 / yr | $2M | |
| 2 | Maui County | Low | 0.75 / yr | $246K | |
| 3 | Hawaii County | Low | 0.78 / yr | $125K | |
| 4 | Kauai County | Low | 0.26 / yr | $140K | |
| 5 | Kalawao County | Very Low | 0.33 / yr | $92 |
5 Hawaii counties with measurable coastal flood risk. See the national coastal flood ranking or all Hawaii counties by overall risk.
Frequently Asked Questions
Which Hawaii county has the highest coastal flood risk?
Honolulu County has the highest FEMA coastal flood risk score in Hawaii at 75.6 (Medium), with $2M in expected annual losses and about 0.35 events per year.
How many Hawaii counties face significant coastal flood risk?
5 Hawaii counties record measurable coastal flood risk in FEMA's National Risk Index; 0 of them are rated High or Very High.