Enter any address in Ascension Parish, Louisiana to see its FEMA flood zone
Flash flooding from thunderstorms is the most frequent flood event in Ascension Parish County, with 27 recorded instances in the last 30 years. This includes events like the flash flood on July 30, 2025, which occurred during a period of hot, humid conditions and severe thunderstorms. Tropical storms have also impacted the area, such as Hurricane Francine on September 11, 2024, which brought torrential rainfall and significant flash flooding.
National Flood Insurance Program (NFIP) data shows a substantial number of claims in Zone A, with an average payout of $56,836 and an average water depth of 6.2 feet. Zone X and Zone X_UNSHADED also have a notable number of claims, with average water depths of 3.7 feet. Properties in Zone X_SHADED experienced higher average water depths of 6.7 feet. Residents in Zone A, Zone X_SHADED, and areas with lower elevations or without Base Flood Elevation (BFE) should pay particular attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
18 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Ascension Parish, Louisiana has recorded 32 flood-related events since 1996 according to NOAA's Storm Events Database, including 27 flash floods and 3 river or area floods. The county has received 66 federal disaster declarations, 20 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 |
| Tropical Storm Nicholas | Coastal Storm | Sep 12, 2021 |
| Hurricane Ida | Hurricane | Aug 26, 2021 |
| Tropical Storm Ida | Hurricane | Aug 26, 2021 |
| Severe Storms, Tornadoes, And Flooding | Flood | May 17, 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 | 28.00K |
| Flash Flood | Sep 11, 2024 | 0.00K |
| Tropical Storm | Sep 11, 2024 | 1.00M |
| Tropical Storm | Sep 11, 2024 | 62.00K |
| Flash Flood | Dec 9, 2024 | 0.00K |
| Flash Flood | Nov 1, 2024 | 0.00K |
| Flash Flood | Jun 2, 2022 | 0.00K |
| Flash Flood | May 20, 2021 | 0.00K |
| Flash Flood | May 20, 2021 | 1.00K |
| Flash Flood | May 17, 2021 | 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 — Sep 11, 2024
Hurricane Francine formed as a tropical storm in the Gulf of Mexico on September 9, 2024, and intensified into a Category 2 hurricane before making landfall near Houma, Louisiana, on the morning of September 11. With sustained winds of 100 mph and gusts peaking at 105 mph, Francine brought widespread damage to southeastern Louisiana and southern Mississippi. A storm surge of 6-9 feet inundated ...
Tropical Storm — Sep 11, 2024
Hurricane Francine formed as a tropical storm in the Gulf of Mexico on September 9, 2024, and intensified into a Category 2 hurricane before making landfall near Houma, Louisiana, on the morning of September 11. With sustained winds of 100 mph and gusts peaking at 105 mph, Francine brought widespread damage to southeastern Louisiana and southern Mississippi. A storm surge of 6-9 feet inundated ...
Flash Flood — Dec 9, 2024
On December 9, 2024, a slow-moving cold front interacting with a deep moisture plume resulted in prolonged periods of heavy rainfall across southeastern Louisiana. Widespread rainfall totals of 4 to 8 inches were reported, with localized amounts exceeding 10 inches, particularly in the river parishes portions of the Northshore. The excessive rainfall led to flash flooding, with numerous road cl...
Flash Flood — Nov 1, 2024
An upper level system pushed a cold front into Louisiana and Mississippi on Halloween. By November 1st, the front stall over southern Louisiana and Mississippi. This occurred due to the front driving upper system's far distance from the local area and steadily moving farther away. That stalled front became to focus for slow moving showers and storms which led to flash flooding over southern por...
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 Ascension 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 Ascension 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.