Yolo County
California — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 91th
Yolo County faces medium composite natural disaster risk (NRI Risk Index score 91.4, 91th national percentile), driven primarily by drought and earthquake exposure. Expected annual loss across all 18 hazard types is $116M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Drought | Very High | 75.35 / yr | $29M |
| Earthquake | Medium | 0.07 / yr | $42M |
| Riverine Flood | Medium | 0.93 / yr | $42M |
| Wildfire | Low | 0.00 / yr | $988K |
| Landslide | Low | 10.51 / yr | $40K |
| Heat Wave | Low | 7.15 / yr | $2M |
| Volcanic Activity | Very Low | 0.00 / yr | $51 |
| Lightning | Low | 5.84 / yr | $216K |
| Tornado | Very Low | 0.13 / yr | $331K |
| Hail | Very Low | 0.06 / yr | $41K |
| Strong Wind | Very Low | 0.03 / yr | $70K |
| Avalanche | Very Low | 0.01 / yr | $5 |
| Winter Weather | Very Low | 0.07 / yr | $734 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Cold Wave | 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 Yolo County?
Yolo County has a composite FEMA National Risk Index score of 91.4 out of 100, placing it in the Medium category and the 91th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Yolo County?
The three highest-rated hazards are Drought (Very High, $29M EAL), Earthquake (Medium, $42M EAL), Riverine Flood (Medium, $42M EAL). These account for most of the county's expected annual losses.
How does Yolo County compare to other California counties?
Yolo County ranks #38 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. Yolo County's $116M EAL is a statistical average, not a guarantee for any specific year or address.