St. Martin Parish
Louisiana — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 87th
St. Martin Parish faces medium composite natural disaster risk (NRI Risk Index score 87.3, 87th national percentile), driven primarily by hurricane and drought exposure. Expected annual loss across all 18 hazard types is $47M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Hurricane | High | 0.20 / yr | $21M |
| Drought | High | 22.41 / yr | $1M |
| Cold Wave | High | 1.03 / yr | $5M |
| Tornado | Medium | 0.61 / yr | $5M |
| Lightning | High | 86.97 / yr | $753K |
| Coastal Flood | High | 3.69 / yr | $3M |
| Heat Wave | Low | 10.39 / yr | $995K |
| Ice Storm | Medium | 0.45 / yr | $157K |
| Riverine Flood | Low | 1.04 / yr | $9M |
| Winter Weather | Low | 0.94 / yr | $37K |
| Earthquake | Very Low | 0.00 / yr | $136K |
| Strong Wind | Low | 0.81 / yr | $283K |
| Landslide | Very Low | 0.12 / yr | $141 |
| Wildfire | Very Low | 0.00 / yr | $8K |
| Hail | Very Low | 1.21 / yr | $52K |
| 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 St. Martin Parish?
St. Martin Parish has a composite FEMA National Risk Index score of 87.3 out of 100, placing it in the Medium category and the 87th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in St. Martin Parish?
The three highest-rated hazards are Hurricane (High, $21M EAL), Drought (High, $1M EAL), Cold Wave (High, $5M EAL). These account for most of the county's expected annual losses.
How does St. Martin Parish compare to other Louisiana counties?
St. Martin Parish ranks #18 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. St. Martin Parish's $47M EAL is a statistical average, not a guarantee for any specific year or address.