Greenville County
South Carolina — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 94th
Greenville County faces medium composite natural disaster risk (NRI Risk Index score 94.0, 94th national percentile), driven primarily by ice storm and lightning exposure. Expected annual loss across all 18 hazard types is $169M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Ice Storm | Very High | 1.83 / yr | $6M |
| Lightning | Very High | 56.29 / yr | $4M |
| Tornado | High | 0.46 / yr | $20M |
| Riverine Flood | High | 2.79 / yr | $104M |
| Cold Wave | High | 0.38 / yr | $15M |
| Earthquake | Medium | 0.00 / yr | $9M |
| Hail | Medium | 4.80 / yr | $2M |
| Strong Wind | High | 2.56 / yr | $2M |
| Heat Wave | Medium | 1.14 / yr | $2M |
| Hurricane | Medium | 0.04 / yr | $3M |
| Landslide | Low | 0.89 / yr | $17K |
| Winter Weather | Low | 4.76 / yr | $91K |
| Wildfire | Very Low | 0.00 / yr | $73K |
| Drought | Low | 42.13 / yr | $149K |
| 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 Greenville County?
Greenville County has a composite FEMA National Risk Index score of 94.0 out of 100, placing it in the Medium category and the 94th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Greenville County?
The three highest-rated hazards are Ice Storm (Very High, $6M EAL), Lightning (Very High, $4M EAL), Tornado (High, $20M EAL). These account for most of the county's expected annual losses.
How does Greenville County compare to other South Carolina counties?
Greenville County ranks #5 of 46 South Carolina counties for overall natural disaster risk, with a medium 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. Greenville County's $169M EAL is a statistical average, not a guarantee for any specific year or address.