Terrebonne Parish
Louisiana — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 94th
Terrebonne Parish faces medium composite natural disaster risk (NRI Risk Index score 94.2, 94th national percentile), driven primarily by hurricane and coastal flood exposure. Expected annual loss across all 18 hazard types is $141M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Hurricane | Very High | 0.28 / yr | $89M |
| Coastal Flood | High | 4.20 / yr | $9M |
| Heat Wave | Medium | 12.92 / yr | $4M |
| Tornado | High | 0.71 / yr | $9M |
| Lightning | High | 87.67 / yr | $1M |
| Cold Wave | Medium | 0.71 / yr | $6M |
| Drought | Medium | 28.12 / yr | $1M |
| Riverine Flood | Medium | 0.71 / yr | $20M |
| Hail | Low | 0.56 / yr | $505K |
| Winter Weather | Low | 0.37 / yr | $76K |
| Earthquake | Very Low | 0.00 / yr | $329K |
| Strong Wind | Low | 0.56 / yr | $323K |
| Wildfire | Very Low | 0.00 / yr | $9K |
| Landslide | Very Low | 0.13 / yr | $142 |
| Ice Storm | Very Low | 0.01 / yr | $1K |
| 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 Terrebonne Parish?
Terrebonne Parish has a composite FEMA National Risk Index score of 94.2 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 Terrebonne Parish?
The three highest-rated hazards are Hurricane (Very High, $89M EAL), Coastal Flood (High, $9M EAL), Heat Wave (Medium, $4M EAL). These account for most of the county's expected annual losses.
How does Terrebonne Parish compare to other Louisiana counties?
Terrebonne Parish ranks #8 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. Terrebonne Parish's $141M EAL is a statistical average, not a guarantee for any specific year or address.