Anchorage Municipality
Alaska — Natural Disaster Risk Assessment
HighComposite Risk Score
National percentile: 97th
Anchorage Municipality faces high composite natural disaster risk (NRI Risk Index score 97.4, 97th national percentile), driven primarily by earthquake and landslide exposure. Expected annual loss across all 18 hazard types is $367M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Earthquake | High | 0.16 / yr | $353M |
| Landslide | High | 32.43 / yr | $2M |
| Winter Weather | Very High | 9.00 / yr | $2M |
| Avalanche | Very High | 1.00 / yr | $7M |
| Volcanic Activity | Low | 0.01 / yr | $7K |
| Wildfire | Low | 0.00 / yr | $471K |
| Tsunami | Low | 0.30 / yr | $2M |
| Lightning | Low | 9.39 / yr | $201K |
| Coastal Flood | Very Low | 0.01 / yr | $4K |
| Cold Wave | Low | 0.06 / yr | $492K |
| Ice Storm | Very Low | 0.01 / yr | $27K |
| Hail | Very Low | 0.02 / yr | $27K |
| Tornado | Very Low | 0.00 / yr | $1 |
| Riverine Flood | Very Low | 0.04 / yr | $397 |
| Drought | Very Low | 1.39 / yr | $0 |
| Heat Wave | Very Low | 0.00 / yr | $0 |
| Hurricane | Very Low | 0.00 / yr | $0 |
| Strong Wind | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Anchorage Municipality?
Anchorage Municipality has a composite FEMA National Risk Index score of 97.4 out of 100, placing it in the High category and the 97th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Anchorage Municipality?
The three highest-rated hazards are Earthquake (High, $353M EAL), Landslide (High, $2M EAL), Winter Weather (Very High, $2M EAL). These account for most of the county's expected annual losses.
How does Anchorage Municipality compare to other Alaska counties?
Anchorage Municipality ranks #1 of 30 Alaska 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. Anchorage Municipality's $367M EAL is a statistical average, not a guarantee for any specific year or address.