Enter any address in Brazoria County, Texas to see its FEMA flood zone
Flash flooding from thunderstorms is the most frequent flood event in Brazoria County, with 61 occurrences recorded in the last 30 years. However, tropical systems also pose a significant risk. For example, Tropical Storm Alberto caused coastal flooding along the upper Texas coast in June 2024, and Hurricane Nicholas made landfall in September 2021, bringing heavy rainfall and storm surge to the region.
National Flood Insurance Program (NFIP) data shows a substantial number of claims filed across various flood zones. Zone A, which typically has a Base Flood Elevation (BFE) of 0-1 foot, has the highest number of claims at 7,240, with an average payout of $43,174 and an average water depth of 2.2 feet. Zone V, representing coastal areas with high-velocity flood risk, has 1,714 claims with an average payout of $13,151 and a notable average water depth of 6.8 feet.
Homeowners in coastal areas, particularly those in Zone V, and properties located in Zone A should pay close attention to flood risk. Residents in areas prone to flash flooding or near waterways should also be aware of potential flood hazards.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
35 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Brazoria County, Texas has recorded 95 flood-related events since 1996 according to NOAA's Storm Events Database, including 61 flash floods and 2 river or area floods. The county has received 34 federal disaster declarations, 9 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1973–2024)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Hurricane Beryl | Hurricane | Jul 5, 2024 |
| Severe Winter Storm | Severe Ice Storm | Feb 11, 2021 |
| Severe Winter Storms | Severe Ice Storm | Feb 11, 2021 |
| Tropical Storms Marco And Laura | Hurricane | Aug 23, 2020 |
| Hurricane Hanna | Hurricane | Jul 25, 2020 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Hurricane Harvey | Hurricane | Aug 23, 2017 |
| Severe Storms And Flooding | Flood | May 22, 2016 |
| Severe Storms, Tornadoes, Straight-line Winds, And Flooding | Severe Storm | Oct 22, 2015 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Coastal Flood | Jun 19, 2024 | 0.00K |
| Tropical Storm | Jun 18, 2024 | — |
| Storm Surge/Tide | Sep 13, 2021 | — |
| Tropical Storm | Sep 13, 2021 | — |
| Flash Flood | May 1, 2021 | 5.00K |
| Storm Surge/Tide | Aug 26, 2020 | — |
| Tropical Storm | Jul 25, 2020 | — |
| Coastal Flood | Jul 25, 2020 | — |
| Storm Surge/Tide | Sep 21, 2020 | 0.00K |
| Flash Flood | Sep 18, 2019 | 0.00K |
Coastal Flood — Jun 19, 2024
A Potential Tropical Cyclone became Tropical Storm Alberto as it moved generally westward across the southern Gulf of Mexico and made landfall in the Tampico area. Coastal flooding occurred along the upper Texas coast.
Tropical Storm — Jun 18, 2024
A Potential Tropical Cyclone became Tropical Storm Alberto as it moved generally westward across the southern Gulf of Mexico and made landfall in the Tampico area. Coastal flooding occurred along the upper Texas coast.
Storm Surge/Tide — Sep 13, 2021
Nicholas formed on September 12 in the Southwestern Gulf of Mexico, slowly advancing northeastward along the Middle Texas Coast. It eventually made landfall 10 miles west of Sargent just after midnight on September 14, with maximum sustained wind speeds of 75 mph. Heavy rain bands associated with Nicholas brought widespread rainfall totals of 6 to 10 inches to the Southeast Texas Coast, while s...
Tropical Storm — Sep 13, 2021
Nicholas formed on September 12 in the Southwestern Gulf of Mexico, slowly advancing northeastward along the Middle Texas Coast. It eventually made landfall 10 miles west of Sargent just after midnight on September 14, with maximum sustained wind speeds of 75 mph. Heavy rain bands associated with Nicholas brought widespread rainfall totals of 6 to 10 inches to the Southeast Texas Coast, while s...
Flash Flood — May 1, 2021
A series of thunderstorms resulted in flash flooding in Brazoria and Fort Bend counties.
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 Brazoria County, Texas:
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 Brazoria County, Texas 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.