Los Alamos County
New Mexico — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 4th
Los Alamos County faces very low composite natural disaster risk (NRI Risk Index score 3.6, 4th national percentile), driven primarily by wildfire and landslide exposure. Expected annual loss across all 18 hazard types is $5M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Wildfire | Low | 0.00 / yr | $1M |
| Landslide | Low | 0.08 / yr | $8K |
| Earthquake | Very Low | 0.00 / yr | $558K |
| Winter Weather | Low | 27.09 / yr | $124K |
| Lightning | Low | 69.14 / yr | $287K |
| Hail | Very Low | 0.81 / yr | $72K |
| Riverine Flood | Very Low | 0.39 / yr | $3M |
| Avalanche | Very Low | 0.01 / yr | $11 |
| Cold Wave | Very Low | 0.05 / yr | $74K |
| Heat Wave | Very Low | 0.26 / yr | $17K |
| Tornado | Very Low | 0.01 / yr | $24K |
| Strong Wind | Very Low | 0.19 / yr | $29K |
| Ice Storm | Very Low | 0.01 / yr | $1K |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Drought | Very Low | 93.89 / yr | $0 |
| Hurricane | Very Low | 0.00 / yr | $0 |
| Tsunami | 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 Los Alamos County?
Los Alamos County has a composite FEMA National Risk Index score of 3.6 out of 100, placing it in the Very Low category and the 4th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Los Alamos County?
The three highest-rated hazards are Wildfire (Low, $1M EAL), Landslide (Low, $8K EAL), Earthquake (Very Low, $558K EAL). These account for most of the county's expected annual losses.
How does Los Alamos County compare to other New Mexico counties?
Los Alamos County ranks #32 of 33 New Mexico 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. Los Alamos County's $5M EAL is a statistical average, not a guarantee for any specific year or address.