Lafourche Parish
Louisiana — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 91th
Lafourche Parish faces medium composite natural disaster risk (NRI Risk Index score 91.3, 91th national percentile), driven primarily by hurricane and tornado exposure. Expected annual loss across all 18 hazard types is $83M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Hurricane | High | 0.29 / yr | $54M |
| Tornado | High | 0.64 / yr | $9M |
| Heat Wave | Medium | 18.39 / yr | $3M |
| Drought | Medium | 27.91 / yr | $1M |
| Lightning | High | 88.62 / yr | $780K |
| Coastal Flood | Medium | 3.90 / yr | $2M |
| Cold Wave | Medium | 0.91 / yr | $3M |
| Riverine Flood | Low | 0.71 / yr | $9M |
| Hail | Low | 0.72 / yr | $346K |
| Strong Wind | Medium | 0.81 / yr | $534K |
| Earthquake | Very Low | 0.00 / yr | $296K |
| Winter Weather | Low | 0.91 / yr | $62K |
| Landslide | Very Low | 0.13 / yr | $155 |
| Wildfire | Very Low | 0.00 / yr | $6K |
| Ice Storm | Very Low | 0.01 / yr | $484 |
| 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 Lafourche Parish?
Lafourche Parish has a composite FEMA National Risk Index score of 91.3 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 Lafourche Parish?
The three highest-rated hazards are Hurricane (High, $54M EAL), Tornado (High, $9M EAL), Heat Wave (Medium, $3M EAL). These account for most of the county's expected annual losses.
How does Lafourche Parish compare to other Louisiana counties?
Lafourche Parish ranks #12 of 64 Louisiana 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. Lafourche Parish's $83M EAL is a statistical average, not a guarantee for any specific year or address.