Broomfield County
Colorado — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 35th
Broomfield County faces very low composite natural disaster risk (NRI Risk Index score 34.7, 35th national percentile), driven primarily by hail and lightning exposure. Expected annual loss across all 18 hazard types is $17M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Hail | Medium | 6.27 / yr | $3M |
| Lightning | High | 47.19 / yr | $2M |
| Winter Weather | Medium | 14.07 / yr | $252K |
| Wildfire | Low | 0.00 / yr | $325K |
| Tornado | Low | 0.03 / yr | $3M |
| Strong Wind | Medium | 1.18 / yr | $1M |
| Cold Wave | Low | 1.20 / yr | $1M |
| Volcanic Activity | Very Low | 0.00 / yr | $18 |
| Earthquake | Very Low | 0.00 / yr | $381K |
| Ice Storm | Low | 0.01 / yr | $84K |
| Riverine Flood | Very Low | 0.07 / yr | $6M |
| Heat Wave | Very Low | 0.91 / yr | $215K |
| Drought | Very Low | 10.68 / yr | $1K |
| Landslide | Very Low | 0.01 / yr | $17 |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Hurricane | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Broomfield County?
Broomfield County has a composite FEMA National Risk Index score of 34.7 out of 100, placing it in the Very Low category and the 35th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Broomfield County?
The three highest-rated hazards are Hail (Medium, $3M EAL), Lightning (High, $2M EAL), Winter Weather (Medium, $252K EAL). These account for most of the county's expected annual losses.
How does Broomfield County compare to other Colorado counties?
Broomfield County ranks #35 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. Broomfield County's $17M EAL is a statistical average, not a guarantee for any specific year or address.