Benton County
Iowa — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 29th
Benton County faces very low composite natural disaster risk (NRI Risk Index score 28.8, 29th national percentile), driven primarily by drought and strong wind exposure. Expected annual loss across all 18 hazard types is $16M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Drought | Medium | 15.49 / yr | $2M |
| Strong Wind | Medium | 5.55 / yr | $2M |
| Hail | Medium | 4.73 / yr | $1M |
| Winter Weather | Low | 16.16 / yr | $128K |
| Ice Storm | Low | 0.31 / yr | $113K |
| Tornado | Low | 0.67 / yr | $2M |
| Landslide | Very Low | 0.10 / yr | $1K |
| Riverine Flood | Low | 1.18 / yr | $8M |
| Wildfire | Very Low | 0.00 / yr | $35K |
| Cold Wave | Very Low | 7.89 / yr | $423K |
| Earthquake | Very Low | 0.00 / yr | $50K |
| Heat Wave | Very Low | 6.00 / yr | $79K |
| Lightning | Very Low | 44.07 / yr | $85K |
| Hurricane | Very Low | 0.01 / yr | $4K |
| 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 Benton County?
Benton County has a composite FEMA National Risk Index score of 28.8 out of 100, placing it in the Very Low category and the 29th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Benton County?
The three highest-rated hazards are Drought (Medium, $2M EAL), Strong Wind (Medium, $2M EAL), Hail (Medium, $1M EAL). These account for most of the county's expected annual losses.
How does Benton County compare to other Iowa counties?
Benton County ranks #67 of 99 Iowa 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. Benton County's $16M EAL is a statistical average, not a guarantee for any specific year or address.