Alamosa County
Colorado — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 40th
Alamosa County faces very low composite natural disaster risk (NRI Risk Index score 40.4, 40th national percentile), driven primarily by drought and avalanche exposure. Expected annual loss across all 18 hazard types is $8M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Drought | High | 72.96 / yr | $1M |
| Avalanche | Medium | 0.03 / yr | $457K |
| Earthquake | Low | 0.00 / yr | $1M |
| Lightning | Medium | 57.71 / yr | $263K |
| Wildfire | Very Low | 0.00 / yr | $62K |
| Cold Wave | Low | 1.07 / yr | $826K |
| Winter Weather | Low | 6.11 / yr | $40K |
| Hail | Low | 0.79 / yr | $148K |
| Riverine Flood | Low | 0.07 / yr | $3M |
| Landslide | Very Low | 0.08 / yr | $363 |
| Ice Storm | Very Low | 0.01 / yr | $9K |
| Tornado | Very Low | 0.05 / yr | $109K |
| Heat Wave | Very Low | 0.34 / yr | $23K |
| Strong Wind | Very Low | 0.06 / yr | $13K |
| Coastal Flood | Very Low | 0.00 / 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 Alamosa County?
Alamosa County has a composite FEMA National Risk Index score of 40.4 out of 100, placing it in the Very Low category and the 40th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Alamosa County?
The three highest-rated hazards are Drought (High, $1M EAL), Avalanche (Medium, $457K EAL), Earthquake (Low, $1M EAL). These account for most of the county's expected annual losses.
How does Alamosa County compare to other Colorado counties?
Alamosa County ranks #30 of 64 Colorado 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. Alamosa County's $8M EAL is a statistical average, not a guarantee for any specific year or address.