Greene County
Ohio — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 76th
Greene County faces low composite natural disaster risk (NRI Risk Index score 75.7, 76th national percentile), driven primarily by cold wave and ice storm exposure. Expected annual loss across all 18 hazard types is $42M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Cold Wave | High | 3.95 / yr | $10M |
| Ice Storm | High | 1.12 / yr | $788K |
| Strong Wind | Medium | 2.22 / yr | $2M |
| Tornado | Medium | 0.27 / yr | $5M |
| Earthquake | Low | 0.00 / yr | $2M |
| Riverine Flood | Medium | 2.14 / yr | $20M |
| Lightning | Medium | 47.51 / yr | $708K |
| Hail | Medium | 3.43 / yr | $790K |
| Winter Weather | Medium | 10.84 / yr | $163K |
| Heat Wave | Low | 4.84 / yr | $883K |
| Landslide | Very Low | 0.10 / yr | $3K |
| Drought | Low | 0.65 / yr | $140K |
| Hurricane | Very Low | 0.01 / yr | $30K |
| Wildfire | Very Low | 0.00 / yr | $18K |
| 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 Greene County?
Greene County has a composite FEMA National Risk Index score of 75.7 out of 100, placing it in the Low category and the 76th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Greene County?
The three highest-rated hazards are Cold Wave (High, $10M EAL), Ice Storm (High, $788K EAL), Strong Wind (Medium, $2M EAL). These account for most of the county's expected annual losses.
How does Greene County compare to other Ohio counties?
Greene County ranks #18 of 88 Ohio 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. Greene County's $42M EAL is a statistical average, not a guarantee for any specific year or address.