Riverine Flood Risk in Hawaii
All Hawaii counties ranked by FEMA National Risk Index riverine flood score
Riverine Flood risk — rivers and streams overflowing their banks after heavy rain or snowmelt — is rated for 5 of 5 Hawaii counties in FEMA's National Risk Index. Honolulu County carries the state's highest riverine flood score at 99.3, with $330M in expected annual riverine flood losses.
3 Hawaii counties are rated High or Very High for riverine flood, and expected annual losses from riverine flood total roughly $622M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Riverine Flood
| # | County | Riverine Flood Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Honolulu County | Very High | 5.93 / yr | $330M | |
| 2 | Hawaii County | High | 5.64 / yr | $185M | |
| 3 | Maui County | High | 4.32 / yr | $59M | |
| 4 | Kauai County | Medium | 5.82 / yr | $48M | |
| 5 | Kalawao County | Very Low | 0.01 / yr | $155K |
5 Hawaii counties with measurable riverine flood risk. See the national riverine flood ranking or all Hawaii counties by overall risk.
Frequently Asked Questions
Which Hawaii county has the highest riverine flood risk?
Honolulu County has the highest FEMA riverine flood risk score in Hawaii at 99.3 (Very High), with $330M in expected annual losses and about 5.93 events per year.
How many Hawaii counties face significant riverine flood risk?
5 Hawaii counties record measurable riverine flood risk in FEMA's National Risk Index; 3 of them are rated High or Very High.