Yukon-Koyukuk Census Area
Alaska — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 62th
Yukon-Koyukuk Census Area faces low composite natural disaster risk (NRI Risk Index score 61.5, 62th national percentile), driven primarily by cold wave and landslide exposure. Expected annual loss across all 18 hazard types is $12M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Cold Wave | High | 5.07 / yr | $9M |
| Landslide | Medium | 3.65 / yr | $68K |
| Wildfire | Medium | 0.01 / yr | $1M |
| Avalanche | Medium | 0.03 / yr | $457K |
| Winter Weather | Medium | 24.89 / yr | $113K |
| Earthquake | Low | 0.09 / yr | $647K |
| Volcanic Activity | Very Low | 0.02 / yr | $4 |
| Ice Storm | Very Low | 0.01 / yr | $9K |
| Lightning | Very Low | 32.90 / yr | $26K |
| Riverine Flood | Very Low | 0.01 / yr | $527K |
| Strong Wind | Very Low | 0.00 / yr | $25 |
| Hail | Very Low | 0.00 / yr | $6 |
| Tornado | Very Low | 0.00 / yr | $1 |
| Coastal Flood | 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 |
| Tsunami | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Yukon-Koyukuk Census Area?
Yukon-Koyukuk Census Area has a composite FEMA National Risk Index score of 61.5 out of 100, placing it in the Low category and the 62th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Yukon-Koyukuk Census Area?
The three highest-rated hazards are Cold Wave (High, $9M EAL), Landslide (Medium, $68K EAL), Wildfire (Medium, $1M EAL). These account for most of the county's expected annual losses.
How does Yukon-Koyukuk Census Area compare to other Alaska counties?
Yukon-Koyukuk Census Area ranks #7 of 30 Alaska counties for overall natural disaster risk, with a 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. Yukon-Koyukuk Census Area's $12M EAL is a statistical average, not a guarantee for any specific year or address.