Honolulu County
Hawaii — Natural Disaster Risk Assessment
HighComposite Risk Score
National percentile: 99th
Honolulu County faces high composite natural disaster risk (NRI Risk Index score 98.8, 99th national percentile), driven primarily by lightning and landslide exposure. Expected annual loss across all 18 hazard types is $517M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Lightning | Very High | 76.82 / yr | $13M |
| Landslide | High | 0.32 / yr | $4M |
| Riverine Flood | Very High | 5.93 / yr | $330M |
| Wildfire | High | 0.01 / yr | $27M |
| Earthquake | High | 0.01 / yr | $93M |
| Tsunami | High | 0.66 / yr | $48M |
| Coastal Flood | Medium | 0.35 / yr | $2M |
| Hurricane | Low | 0.02 / yr | $880K |
| Ice Storm | Medium | 0.01 / yr | $159K |
| Tornado | Low | 0.02 / yr | $688K |
| Drought | Very Low | 1.96 / yr | $147 |
| Hail | Very Low | 0.01 / yr | $39K |
| Strong Wind | Very Low | 0.01 / yr | $64K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Cold Wave | Very Low | 0.00 / yr | $0 |
| Heat Wave | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
| Winter Weather | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Honolulu County?
Honolulu County has a composite FEMA National Risk Index score of 98.8 out of 100, placing it in the High category and the 99th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Honolulu County?
The three highest-rated hazards are Lightning (Very High, $13M EAL), Landslide (High, $4M EAL), Riverine Flood (Very High, $330M EAL). These account for most of the county's expected annual losses.
How does Honolulu County compare to other Hawaii counties?
Honolulu County ranks #1 of 5 Hawaii counties for overall natural disaster risk, with a high rating.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. Honolulu County's $517M EAL is a statistical average, not a guarantee for any specific year or address.