Siskiyou County
California — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 89th
Siskiyou County faces medium composite natural disaster risk (NRI Risk Index score 89.0, 89th national percentile), driven primarily by drought and wildfire exposure. Expected annual loss across all 18 hazard types is $57M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Drought | High | 73.65 / yr | $5M |
| Wildfire | High | 0.01 / yr | $14M |
| Volcanic Activity | High | 0.00 / yr | $2M |
| Landslide | Medium | 7.55 / yr | $47K |
| Riverine Flood | Medium | 1.00 / yr | $31M |
| Earthquake | Low | 0.02 / yr | $3M |
| Avalanche | Medium | 0.03 / yr | $502K |
| Heat Wave | Low | 5.86 / yr | $991K |
| Winter Weather | Medium | 29.71 / yr | $118K |
| Lightning | Low | 11.70 / yr | $98K |
| Hail | Very Low | 0.12 / yr | $51K |
| Cold Wave | Very Low | 0.01 / yr | $26K |
| Strong Wind | Very Low | 0.04 / yr | $28K |
| Tornado | Very Low | 0.04 / yr | $2K |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Hurricane | Very Low | 0.00 / yr | $0 |
| Ice Storm | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Siskiyou County?
Siskiyou County has a composite FEMA National Risk Index score of 89.0 out of 100, placing it in the Medium category and the 89th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Siskiyou County?
The three highest-rated hazards are Drought (High, $5M EAL), Wildfire (High, $14M EAL), Volcanic Activity (High, $2M EAL). These account for most of the county's expected annual losses.
How does Siskiyou County compare to other California counties?
Siskiyou County ranks #40 of 58 California 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. Siskiyou County's $57M EAL is a statistical average, not a guarantee for any specific year or address.