Dearborn County
Indiana — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 45th
Dearborn County faces low composite natural disaster risk (NRI Risk Index score 45.2, 45th national percentile), driven primarily by landslide and strong wind exposure. Expected annual loss across all 18 hazard types is $19M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Landslide | Medium | 0.48 / yr | $69K |
| Strong Wind | Medium | 3.86 / yr | $2M |
| Tornado | Medium | 0.21 / yr | $4M |
| Cold Wave | Low | 2.37 / yr | $2M |
| Lightning | Low | 49.51 / yr | $375K |
| Ice Storm | Low | 0.92 / yr | $143K |
| Riverine Flood | Low | 2.32 / yr | $9M |
| Earthquake | Very Low | 0.00 / yr | $401K |
| Heat Wave | Very Low | 6.37 / yr | $242K |
| Winter Weather | Low | 10.63 / yr | $41K |
| Hail | Very Low | 3.59 / yr | $137K |
| Drought | Very Low | 2.75 / yr | $19K |
| Wildfire | Very Low | 0.00 / yr | $5K |
| 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 Dearborn County?
Dearborn County has a composite FEMA National Risk Index score of 45.2 out of 100, placing it in the Low category and the 45th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Dearborn County?
The three highest-rated hazards are Landslide (Medium, $69K EAL), Strong Wind (Medium, $2M EAL), Tornado (Medium, $4M EAL). These account for most of the county's expected annual losses.
How does Dearborn County compare to other Indiana counties?
Dearborn County ranks #40 of 92 Indiana 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. Dearborn County's $19M EAL is a statistical average, not a guarantee for any specific year or address.