Nassau County
Florida — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 59th
Nassau County faces low composite natural disaster risk (NRI Risk Index score 59.3, 59th national percentile), driven primarily by hurricane and wildfire exposure. Expected annual loss across all 18 hazard types is $25M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Hurricane | Medium | 0.29 / yr | $7M |
| Wildfire | Low | 0.00 / yr | $968K |
| Coastal Flood | Medium | 3.51 / yr | $2M |
| Heat Wave | Low | 4.20 / yr | $1M |
| Lightning | Medium | 73.37 / yr | $615K |
| Earthquake | Low | 0.00 / yr | $626K |
| Riverine Flood | Low | 0.57 / yr | $10M |
| Tornado | Low | 0.32 / yr | $2M |
| Ice Storm | Low | 0.20 / yr | $115K |
| Landslide | Very Low | 0.08 / yr | $206 |
| Hail | Very Low | 1.78 / yr | $92K |
| Strong Wind | Low | 0.87 / yr | $192K |
| Drought | Very Low | 18.89 / yr | $1K |
| Cold Wave | Very Low | 2.68 / yr | $126K |
| Winter Weather | Very Low | 0.10 / yr | $7K |
| Avalanche | 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 Nassau County?
Nassau County has a composite FEMA National Risk Index score of 59.3 out of 100, placing it in the Low category and the 59th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Nassau County?
The three highest-rated hazards are Hurricane (Medium, $7M EAL), Wildfire (Low, $968K EAL), Coastal Flood (Medium, $2M EAL). These account for most of the county's expected annual losses.
How does Nassau County compare to other Florida counties?
Nassau County ranks #52 of 67 Florida 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. Nassau County's $25M EAL is a statistical average, not a guarantee for any specific year or address.