Gretna, LA
Local storm history & FEMA National Risk Index data
Gretna is rated Relatively High for overall natural hazard risk — higher risk than most US counties — based on FEMA's National Risk Index for Jefferson Parish, LA. The county's highest-rated hazards are hurricane, lightning, and heat wave.
Storm events near Gretna
NOAA-recorded tornado, hail, and flood events within 25 miles of Gretna's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Gretna itself, not the whole county.
County-wide hazard risk
Every other hazard FEMA and NOAA track — including drought — is only scored at the county level. These are Jefferson Parish's FEMA National Risk Index scores, covering Gretna along with the rest of the county, not a Gretna-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 27.3 | Very Low |
| Inland Flooding | 96 | Relatively High |
| Coastal Flooding | 95.6 | Very High |
| Earthquake | 78 | Relatively Low |
| Heat Wave | 97.5 | Relatively High |
| Tornado | 72.2 | Relatively Moderate |
| Avalanche | — | Not Applicable |
| Cold Wave | 96.5 | Relatively High |
| Drought | 50 | Relatively Low |
| Hail | 96.4 | Relatively High |
| Hurricane | 99.8 | Very High |
| Ice Storm | 89.7 | Relatively High |
| Landslide | 28.1 | Very Low |
| Lightning | 98.6 | Very High |
| Strong Wind | 63.5 | Relatively Moderate |
| Tsunami | — | Insufficient Data |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 85.6 | Relatively High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Jefferson Parish risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Jefferson Parish:
More on Jefferson Parish:
Frequently asked questions
What natural hazards is Gretna, LA at risk of?
Gretna is rated Relatively High for overall natural hazard risk by FEMA's National Risk Index — higher risk than most US counties. The highest-rated hazards for Jefferson Parish, where Gretna is located, are hurricane, lightning, and heat wave.
What is Gretna's biggest natural hazard risk?
Hurricane is the highest-rated hazard for Jefferson Parish, where Gretna is located, scoring 99.8 out of 100 on FEMA's National Risk Index (rated "Very High").
Is Gretna a high-risk area for natural disasters?
Yes — Gretna carries higher risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively High" for Jefferson Parish.
Has Gretna had tornadoes, hail, or flooding?
NOAA has recorded 29 tornado, 31 hail, 270 inland flooding events within 25 miles of Gretna since 2016.