Shiawassee County
Michigan — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 62th
Shiawassee County faces low composite natural disaster risk (NRI Risk Index score 62.2, 62th national percentile), driven primarily by strong wind and tornado exposure. Expected annual loss across all 18 hazard types is $22M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Strong Wind | High | 5.67 / yr | $3M |
| Tornado | Medium | 0.25 / yr | $5M |
| Cold Wave | Medium | 2.79 / yr | $5M |
| Ice Storm | Medium | 1.50 / yr | $193K |
| Hail | Low | 2.87 / yr | $427K |
| Heat Wave | Low | 2.47 / yr | $475K |
| Riverine Flood | Low | 0.50 / yr | $8M |
| Landslide | Very Low | 0.08 / yr | $775 |
| Hurricane | Very Low | 0.02 / yr | $28K |
| Earthquake | Very Low | 0.00 / yr | $144K |
| Lightning | Low | 33.56 / yr | $114K |
| Winter Weather | Very Low | 11.32 / yr | $19K |
| Wildfire | Very Low | 0.00 / yr | $3K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Drought | 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 Shiawassee County?
Shiawassee County has a composite FEMA National Risk Index score of 62.2 out of 100, placing it in the Low category and the 62th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Shiawassee County?
The three highest-rated hazards are Strong Wind (High, $3M EAL), Tornado (Medium, $5M EAL), Cold Wave (Medium, $5M EAL). These account for most of the county's expected annual losses.
How does Shiawassee County compare to other Michigan counties?
Shiawassee County ranks #30 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. Shiawassee County's $22M EAL is a statistical average, not a guarantee for any specific year or address.