Natural disaster risk in St. Mary Parish, Louisiana
Louisiana · population 49,313 · FIPS 22101
Overall: relatively moderate risk
St. Mary Parish has a composite risk score of 88.9 out of 100 — higher than 88% of US counties. It ranks 14 of 64 in Louisiana (1 = highest risk). Its highest-rated hazards are hurricane, coastal flooding, drought.
Drought now: Yes: D1 Moderate Drought, 9 weeks
Yes. On the U.S. Drought Monitor map valid 13 October 2026, 99.99% of St. Mary Parish is in D1 Moderate Drought. Some of it has been at D1 or worse for 9 weeks in a row.
Drought in St. Mary Parish: the last 52 weeks · droughtmonitor.unl.edu
The U.S. Drought Monitor is jointly produced by the National Drought Mitigation Center at the University of Nebraska-Lincoln, the United States Department of Agriculture, the National Oceanic and Atmospheric Administration and the National Aeronautics and Space Administration. Map courtesy of NDMC.
Risk, loss, vulnerability and resilience
| Measure | Rating and score |
|---|---|
| Overall risk Expected annual loss, adjusted for social vulnerability and community resilience. |
Relatively moderate 88.9 |
| Expected annual loss About $60.7 million a year, on average, across all 18 hazards. |
Relatively moderate 86.4 |
| Social vulnerability Higher means people may find it harder to prepare and recover. |
Relatively high 75.6 |
| Community resilience Higher means a stronger ability to prepare, adapt and recover. |
Very high 88.2 |
Risk by hazard
FEMA's risk rating for each of 18 natural hazards in St. Mary Parish, highest first. "Not applicable" means the hazard is not modelled here.
| Hazard | Risk rating and score |
|---|---|
| Hurricane | Relatively high 97 |
| Coastal flooding | Relatively high 93 |
| Drought | Relatively high 91 |
| Tornado | Relatively moderate 86 |
| Cold wave | Relatively moderate 76 |
| Lightning | Relatively moderate 66 |
| Heat wave | Relatively low 74 |
| Inland (riverine) flooding | Relatively low 50 |
| Strong wind | Relatively low 46 |
| Hail | Relatively low 42 |
| Winter weather | Relatively low 35 |
| Ice storm | Relatively low 32 |
| Earthquake | Very low 43 |
| Landslide | Very low 17 |
| Wildfire | Very low 14 |
| Avalanche | Not applicable |
| Tsunami | Insufficient data |
| Volcanic activity | Not applicable |
FEMA disaster declarations for St. Mary Parish
Federal declarations that designated St. Mary Parish, since 1 Jan 2024 (the period this site keeps from OpenFEMA). Older declarations are in FEMA's own dataset.
Yes. St. Mary Parish has been named in 3 FEMA declarations since 1 Jan 2024. The latest is EM-3638-LA (Severe Winter Storm), declared 24 Jan 2026.
| Declaration | Kind | Incident | Declared | Individual assistance here |
|---|---|---|---|---|
| EM-3638-LA | Emergency | Severe Winter Storm | 24 Jan 2026 | No |
| DR-4817-LA | Major disaster | Hurricane Francine | 16 Sep 2024 | Yes |
| EM-3614-LA | Emergency | Tropical Storm Francine | 10 Sep 2024 | No |
All FEMA declarations in Louisiana, with estimated apply-by dates · Open FEMA deadlines
This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s). Dataset: Disaster Declarations Summaries - v2.
How to read these ratings
- Ratings run in five steps: very low, relatively low, relatively moderate, relatively high and very high. They compare a county with every other US county; they are not a measure of danger on their own.
- Scores run from 0 to 100 and are national percentiles. The bar shows the score: a score of 80 means a higher value than 80% of US counties.
- Overall risk combines the expected annual loss with social vulnerability and community resilience.
- Expected annual loss is the average yearly loss to buildings, people and agriculture the model expects from all 18 hazards.
- Social vulnerability describes how hard it may be for people to prepare for and recover from a disaster. Higher is worse.
- Community resilience describes a community's ability to prepare, adapt and recover. Higher is better.
- "Not applicable" means FEMA does not model that hazard there (for example, hurricanes far inland).
About this data
Source: FEMA National Risk Index, version 1.20, released December 2025, published by the Federal Emergency Management Agency (US public domain). About the National Risk Index. The index is a model of relative risk built from historical hazard records, what is exposed and community factors. It is not a forecast, it does not describe any single property, and it is not insurance or financial advice. For decisions about a specific address, check FEMA's flood maps and your local emergency management office.
Questions
What is the natural disaster risk in St. Mary Parish, Louisiana?
FEMA's National Risk Index rates the overall risk in St. Mary Parish as relatively moderate, with a score of 88.9 out of 100 (higher than 88% of US counties). That is a comparison with other US counties, not a forecast.
What are the biggest natural hazards in St. Mary Parish?
The hazards rated highest for St. Mary Parish are hurricane (relatively high), coastal flooding (relatively high), drought (relatively high).
What is the flood risk in St. Mary Parish?
FEMA rates inland (river and rain) flooding risk in St. Mary Parish as relatively low, and coastal flooding risk as relatively high. For a specific property, check the FEMA flood map and your local floodplain office.
Has St. Mary Parish had a FEMA disaster declaration?
Yes. St. Mary Parish has been named in 3 FEMA declarations since 1 Jan 2024. The latest is EM-3638-LA (Severe Winter Storm), declared 24 Jan 2026.
Is St. Mary Parish in a drought?
Yes. On the U.S. Drought Monitor map valid 13 October 2026, 99.99% of St. Mary Parish is in D1 Moderate Drought. Some of it has been at D1 or worse for 9 weeks in a row.
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