Chugach Census Area
Alaska — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 20th
Chugach Census Area faces very low composite natural disaster risk (NRI Risk Index score 19.6, 20th national percentile), driven primarily by landslide and avalanche exposure. Expected annual loss across all 18 hazard types is $10M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Landslide | Medium | 76.51 / yr | $396K |
| Avalanche | Very High | 0.77 / yr | $5M |
| Earthquake | Low | 0.13 / yr | $3M |
| Cold Wave | Low | 1.64 / yr | $1M |
| Winter Weather | Low | 7.51 / yr | $41K |
| Tsunami | Very Low | 0.30 / yr | $307K |
| Coastal Flood | Very Low | 0.01 / yr | $558 |
| Wildfire | Very Low | 0.00 / yr | $694 |
| Lightning | Very Low | 4.46 / yr | $6K |
| Ice Storm | Very Low | 0.01 / yr | $504 |
| Riverine Flood | Very Low | 0.01 / yr | $266K |
| Hail | Very Low | 0.00 / yr | $16 |
| Tornado | Very Low | 0.00 / yr | $0 |
| Drought | Very Low | 0.00 / 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 |
| Volcanic Activity | Very Low | 0.01 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Chugach Census Area?
Chugach Census Area has a composite FEMA National Risk Index score of 19.6 out of 100, placing it in the Very Low category and the 20th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Chugach Census Area?
The three highest-rated hazards are Landslide (Medium, $396K EAL), Avalanche (Very High, $5M EAL), Earthquake (Low, $3M EAL). These account for most of the county's expected annual losses.
How does Chugach Census Area compare to other Alaska counties?
Chugach Census Area ranks #18 of 30 Alaska counties for overall natural disaster risk, with a very low 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. Chugach Census Area's $10M EAL is a statistical average, not a guarantee for any specific year or address.