Coos County
Oregon — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 92th
Coos County faces medium composite natural disaster risk (NRI Risk Index score 91.9, 92th national percentile), driven primarily by earthquake and landslide exposure. Expected annual loss across all 18 hazard types is $90M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Earthquake | High | 0.02 / yr | $52M |
| Landslide | Medium | 12.77 / yr | $156K |
| Coastal Flood | High | 4.75 / yr | $4M |
| Riverine Flood | Medium | 2.25 / yr | $22M |
| Tsunami | Medium | 0.15 / yr | $11M |
| Wildfire | Low | 0.00 / yr | $96K |
| Heat Wave | Low | 2.36 / yr | $305K |
| Avalanche | Very Low | 0.01 / yr | $126 |
| Winter Weather | Low | 8.66 / yr | $23K |
| Lightning | Low | 5.51 / yr | $71K |
| Drought | Very Low | 24.56 / yr | $236 |
| Ice Storm | Very Low | 0.01 / yr | $6K |
| Strong Wind | Very Low | 0.03 / yr | $34K |
| Tornado | Very Low | 0.01 / yr | $11K |
| Hail | Very Low | 0.03 / yr | $7K |
| Cold Wave | Very Low | 0.00 / yr | $0 |
| Hurricane | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Coos County?
Coos County has a composite FEMA National Risk Index score of 91.9 out of 100, placing it in the Medium category and the 92th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Coos County?
The three highest-rated hazards are Earthquake (High, $52M EAL), Landslide (Medium, $156K EAL), Coastal Flood (High, $4M EAL). These account for most of the county's expected annual losses.
How does Coos County compare to other Oregon counties?
Coos County ranks #9 of 36 Oregon counties for overall natural disaster risk, with a medium 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. Coos County's $90M EAL is a statistical average, not a guarantee for any specific year or address.