Davis County
Iowa — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 50th
Davis County faces low composite natural disaster risk (NRI Risk Index score 50.3, 50th national percentile), driven primarily by drought and landslide exposure. Expected annual loss across all 18 hazard types is $11M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Drought | High | 14.41 / yr | $5M |
| Landslide | Low | 0.27 / yr | $10K |
| Heat Wave | Low | 7.58 / yr | $827K |
| Tornado | Medium | 0.31 / yr | $2M |
| Wildfire | Low | 0.00 / yr | $110K |
| Strong Wind | Medium | 4.28 / yr | $560K |
| Lightning | Medium | 45.02 / yr | $213K |
| Hail | Low | 3.72 / yr | $240K |
| Cold Wave | Low | 4.58 / yr | $387K |
| Ice Storm | Low | 0.35 / yr | $30K |
| Earthquake | Very Low | 0.00 / yr | $68K |
| Riverine Flood | Very Low | 0.96 / yr | $3M |
| Winter Weather | Low | 11.11 / yr | $20K |
| Hurricane | Very Low | 0.01 / yr | $2K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | 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 Davis County?
Davis County has a composite FEMA National Risk Index score of 50.3 out of 100, placing it in the Low category and the 50th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Davis County?
The three highest-rated hazards are Drought (High, $5M EAL), Landslide (Low, $10K EAL), Heat Wave (Low, $827K EAL). These account for most of the county's expected annual losses.
How does Davis County compare to other Iowa counties?
Davis County ranks #25 of 99 Iowa 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. Davis County's $11M EAL is a statistical average, not a guarantee for any specific year or address.