Seminole County
Florida — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 91th
Seminole County faces medium composite natural disaster risk (NRI Risk Index score 91.4, 91th national percentile), driven primarily by tornado and strong wind exposure. Expected annual loss across all 18 hazard types is $129M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Tornado | High | 0.23 / yr | $26M |
| Strong Wind | High | 1.07 / yr | $5M |
| Lightning | High | 87.16 / yr | $3M |
| Hurricane | High | 0.25 / yr | $25M |
| Riverine Flood | Medium | 0.46 / yr | $66M |
| Wildfire | Medium | 0.01 / yr | $2M |
| Heat Wave | Low | 1.90 / yr | $2M |
| Earthquake | Low | 0.00 / yr | $786K |
| Cold Wave | Low | 3.90 / yr | $484K |
| Hail | Very Low | 2.06 / yr | $96K |
| Landslide | Very Low | 0.03 / yr | $140 |
| Drought | Very Low | 13.59 / yr | $3K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.01 / yr | $0 |
| Ice Storm | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
| Winter Weather | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Seminole County?
Seminole County has a composite FEMA National Risk Index score of 91.4 out of 100, placing it in the Medium category and the 91th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Seminole County?
The three highest-rated hazards are Tornado (High, $26M EAL), Strong Wind (High, $5M EAL), Lightning (High, $3M EAL). These account for most of the county's expected annual losses.
How does Seminole County compare to other Florida counties?
Seminole County ranks #29 of 67 Florida 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. Seminole County's $129M EAL is a statistical average, not a guarantee for any specific year or address.