Lenawee County
Michigan — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 70th
Lenawee County faces low composite natural disaster risk (NRI Risk Index score 69.9, 70th national percentile), driven primarily by strong wind and tornado exposure. Expected annual loss across all 18 hazard types is $30M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Strong Wind | High | 5.29 / yr | $2M |
| Tornado | Medium | 0.38 / yr | $5M |
| Hail | Medium | 3.23 / yr | $1M |
| Cold Wave | Medium | 2.89 / yr | $5M |
| Ice Storm | Medium | 1.61 / yr | $343K |
| Riverine Flood | Low | 1.00 / yr | $15M |
| Lightning | Medium | 37.70 / yr | $545K |
| Earthquake | Low | 0.00 / yr | $550K |
| Winter Weather | Low | 8.95 / yr | $92K |
| Landslide | Very Low | 0.15 / yr | $2K |
| Heat Wave | Low | 3.58 / yr | $509K |
| Hurricane | Very Low | 0.01 / yr | $25K |
| Drought | Low | 0.49 / yr | $51K |
| Wildfire | Very Low | 0.00 / yr | $9K |
| 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 Lenawee County?
Lenawee County has a composite FEMA National Risk Index score of 69.9 out of 100, placing it in the Low category and the 70th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Lenawee County?
The three highest-rated hazards are Strong Wind (High, $2M EAL), Tornado (Medium, $5M EAL), Hail (Medium, $1M EAL). These account for most of the county's expected annual losses.
How does Lenawee County compare to other Michigan counties?
Lenawee County ranks #22 of 83 Michigan 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. Lenawee County's $30M EAL is a statistical average, not a guarantee for any specific year or address.