Jefferson County
Oregon — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 30th
Jefferson County faces very low composite natural disaster risk (NRI Risk Index score 29.9, 30th national percentile), driven primarily by wildfire and volcanic activity 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
| Wildfire | Medium | 0.01 / yr | $4M |
| Volcanic Activity | Low | 0.01 / yr | $7K |
| Avalanche | Low | 0.03 / yr | $8K |
| Lightning | Medium | 10.95 / yr | $497K |
| Earthquake | Low | 0.00 / yr | $631K |
| Winter Weather | Low | 14.76 / yr | $60K |
| Landslide | Very Low | 0.70 / yr | $871 |
| Riverine Flood | Low | 0.04 / yr | $5M |
| Hail | Very Low | 0.41 / yr | $147K |
| Cold Wave | Low | 0.28 / yr | $479K |
| Heat Wave | Very Low | 3.14 / yr | $77K |
| Ice Storm | Very Low | 0.03 / yr | $17K |
| Drought | Very Low | 60.53 / yr | $3K |
| Strong Wind | Very Low | 0.09 / yr | $114K |
| Tornado | Very Low | 0.03 / yr | $7K |
| Coastal Flood | 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 Jefferson County?
Jefferson County has a composite FEMA National Risk Index score of 29.9 out of 100, placing it in the Very Low category and the 30th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Jefferson County?
The three highest-rated hazards are Wildfire (Medium, $4M EAL), Volcanic Activity (Low, $7K EAL), Avalanche (Low, $8K EAL). These account for most of the county's expected annual losses.
How does Jefferson County compare to other Oregon counties?
Jefferson County ranks #30 of 36 Oregon 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. Jefferson County's $10M EAL is a statistical average, not a guarantee for any specific year or address.