Enter any address in Jefferson Parish, Louisiana to see its FEMA flood zone
Flash flooding from slow-moving thunderstorms is the most frequent flood event in Jefferson Parish County, with 88 occurrences recorded in the last 30 years. These events, often triggered by stalled weather fronts, can overwhelm urban drainage systems, leading to widespread inundation. For example, on April 21st, 2025, slow-moving storms produced long-duration rainfall that overwhelmed the urban landscape, resulting in widespread flash flooding. Other significant flood types include storm surge/tide (24 events) and tropical storms (20 events).
The National Flood Insurance Program (NFIP) data shows a significant number of claims in Zone A, with 75,998 claims averaging $31,622 and a water depth of 1.8 feet. Zone V properties, while fewer in number with 2,611 claims, experienced higher average water depths of 6.6 feet and payouts averaging $15,911. Homeowners in Zone A and Zone V, as well as those in lower-elevation areas or without Base Flood Elevation (BFE) protection, should pay particular attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
85 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Jefferson Parish, Louisiana has recorded 159 flood-related events since 1996 according to NOAA's Storm Events Database, including 88 flash floods and 12 river or area floods. The county has received 50 federal disaster declarations, 10 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1965–2026)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Winter Storm | Winter Storm | Jan 23, 2026 |
| Tropical Storm Francine | Hurricane | Sep 10, 2024 |
| Hurricane Francine | Hurricane | Sep 9, 2024 |
| Seawater Intrusion | Other | Sep 20, 2023 |
| Tropical Storm Nicholas | Coastal Storm | Sep 12, 2021 |
| Hurricane Ida | Hurricane | Aug 26, 2021 |
| Tropical Storm Ida | Hurricane | Aug 26, 2021 |
| Severe Winter Storm | Severe Ice Storm | Feb 11, 2021 |
| Severe Winter Storms | Severe Ice Storm | Feb 11, 2021 |
| Hurricane Zeta | Hurricane | Oct 26, 2020 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jul 30, 2025 | 0.00K |
| Flash Flood | Apr 21, 2025 | 3.00K |
| Flash Flood | Apr 21, 2025 | 0.00K |
| Flash Flood | Apr 21, 2025 | 3.50K |
| Flash Flood | Apr 21, 2025 | 4.00K |
| Flash Flood | May 9, 2025 | 0.00K |
| Flash Flood | Aug 30, 2024 | 0.00K |
| Flash Flood | Jul 26, 2024 | 0.00K |
| Flash Flood | Jul 18, 2024 | 0.00K |
| Flash Flood | May 16, 2024 | 0.00K |
Flash Flood — Jul 30, 2025
A primed microburst environment was in place on July 30, 2025, as hot and humid conditions combined with a weak surface low pressure across southeast Louisiana and southern Mississippi. Numerous severe thunderstorms developed through the afternoon. In Marrero, Jefferson Parish, thunderstorm winds knocked down a powerline, while additional wind damage in Hammond brought down multiple trees, incl...
Flash Flood — Apr 21, 2025
On the afternoon of April 21st, a cold front approaching the region began to stall over central Louisiana as upper-level support and steering flow shifted northeastward. With the front losing its dynamical push, storms developed ahead of it across the New Orleans area and became slow-moving due to the lack of steering flow. These storms produced efficient, long-duration rainfall over the city, ...
Flash Flood — May 9, 2025
A surface low developed in the northwestern Gulf and tracking along the Louisiana coastline on May 9th. As moisture surged northward, training along the leading edge of an appendant warm front created a setup conducive for training of heavy rainfall. Flash flooding occurred across various portions of New Orleans Metro.
Flash Flood — Aug 30, 2024
An upper level centered over Texas began driving moisture into the local area a couple days prior to this event. By the 30th, the atmospheric moisture content had reached values near the record for this time of year. Storms that developed in this environment were able to tap into this moisture to produce quite heavy rainfall and when combined with slow storm movement, produced flash flooding ov...
Flash Flood — Jul 26, 2024
Thunderstorms initiated across southeast Louisiana during the afternoon once the area reached the convective temperature. Due to multiple rounds of rainfall from these storms, New Orleans experienced flash flooding during the evening before the activity waned off shortly after sunset.
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in Jefferson Parish, Louisiana:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in Jefferson Parish, Louisiana that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.