Lassen County
California — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 73th
Lassen County faces low composite natural disaster risk (NRI Risk Index score 73.1, 73th national percentile), driven primarily by wildfire and earthquake exposure. Expected annual loss across all 18 hazard types is $25M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Wildfire | Medium | 0.01 / yr | $7M |
| Earthquake | Low | 0.03 / yr | $4M |
| Volcanic Activity | Low | 0.00 / yr | $3K |
| Drought | Medium | 83.38 / yr | $924K |
| Winter Weather | Medium | 25.89 / yr | $191K |
| Riverine Flood | Medium | 0.29 / yr | $13M |
| Landslide | Very Low | 2.52 / yr | $1K |
| Lightning | Low | 15.51 / yr | $101K |
| Avalanche | Very Low | 0.01 / yr | $60 |
| Heat Wave | Very Low | 1.80 / yr | $73K |
| Hail | Very Low | 0.06 / yr | $14K |
| Strong Wind | Very Low | 0.05 / yr | $31K |
| Tornado | Very Low | 0.05 / yr | $6K |
| Cold Wave | Very Low | 0.00 / yr | $0 |
| 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 Lassen County?
Lassen County has a composite FEMA National Risk Index score of 73.1 out of 100, placing it in the Low category and the 73th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Lassen County?
The three highest-rated hazards are Wildfire (Medium, $7M EAL), Earthquake (Low, $4M EAL), Volcanic Activity (Low, $3K EAL). These account for most of the county's expected annual losses.
How does Lassen County compare to other California counties?
Lassen County ranks #54 of 58 California 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. Lassen County's $25M EAL is a statistical average, not a guarantee for any specific year or address.