Enter any address in Webb County, Texas to see its FEMA flood zone
Flash flooding from thunderstorms is the dominant flood character in Webb County. Between 2005 and 2024, NOAA Storm Events data recorded 109 flash flood events, alongside 7 general flood events, 1 tropical storm, and 1 tropical depression. Recent examples include heavy rainfall events in September 2025 and another in May 2025, which brought significant precipitation to the region.
National Flood Insurance Program (NFIP) claims data shows that properties in Zone A have experienced the most claims, with an average payout of $25,786 and an average water depth of 2.7 feet. Properties in Zone X_UNSHADED also saw substantial claims, averaging $23,960 with a similar average water depth of 2.7 feet. While Zone X_SHADED and Zone X had fewer claims, they still represent areas where flooding has occurred.
Residents in Zone A and Zone X_UNSHADED, as well as those in Zone X and Zone X_SHADED, should pay close attention to flood risk. Homeowners in areas with a history of flash flooding or those located near potential watercourses are particularly advised to be aware of their flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
50 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Webb County, Texas has recorded 118 flood-related events since 1996 according to NOAA's Storm Events Database, including 109 flash floods and 7 river or area floods. The county has received 22 federal disaster declarations, 2 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1972–2024)
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 |
| Hurricane Hanna | Hurricane | Jul 25, 2020 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| El Cenizo Fire | Fire | Apr 4, 2011 |
| Hurricane Alex | Hurricane | Jun 30, 2010 |
| Tropical Storm Alex | Hurricane | Jun 27, 2010 |
| Hurricane Ike | Hurricane | Sep 7, 2008 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Sep 25, 2025 | 0.00K |
| Flood | May 8, 2025 | 0.00K |
| Flash Flood | Sep 7, 2025 | 0.00K |
| Flood | Sep 15, 2024 | 0.00K |
| Flash Flood | Sep 14, 2024 | 0.00K |
| Flash Flood | Nov 1, 2024 | 0.00K |
| Flash Flood | Apr 23, 2023 | 0.00K |
| Flash Flood | Aug 22, 2023 | 0.00K |
| Tropical Storm | Aug 22, 2023 | 25.00K |
| Flash Flood | May 18, 2023 | 0.00K |
Flash Flood — Sep 25, 2025
A heavy rainfall event across South Texas developed as a strong upper-level trough extended southward from the Great Lakes into Texas, providing large-scale ascent and enhanced positive vorticity advection. At the surface, a cold front pushed into the region and eventually stalled, serving as the main focus for lift while interacting with outflow boundaries from earlier convection. Ahead of the...
Flood — May 8, 2025
A cluster of storms in La Salle County progressed southeastward through the evening hours. These storms intensified and developed into a well-organized MCS with a maturing bow echo feature as it extended into northeastern Duval and Jim Wells counties. An uptick in radar velocity was noted beginning north of San Diego, TX around 8:45pm CDT, with large wet melting hail enforcing a notable stronge...
Flash Flood — Sep 7, 2025
The atmosphere on September 7th remained well saturated, with PWAT values into the 1.9 to 2.2 inch range. This deep moisture combined with the passage of a frontal boundary that extended along the coast and continued to move offshore during the early morning hours produced periods of heavy rainfall across South Texas. This was particularly true along the Rio Grande. As the day progressed, moist...
Flood — Sep 15, 2024
A very strong thunderstorm peaked in intensity as it crossed from Mexico into the Laredo area on the night of September 14th. This initial storm contained heavy rain rates and weas then followed by a few other storms in wake during the early morning hours of the 15th. This combination and the flash prone urban area lead to quick flooding on streets and water rescues. Frequent lightning impacted...
Flash Flood — Sep 14, 2024
A very strong thunderstorm peaked in intensity as it crossed from Mexico into the Laredo area on the night of September 14th. This initial storm contained heavy rain rates and weas then followed by a few other storms in wake during the early morning hours of the 15th. This combination and the flash prone urban area lead to quick flooding on streets and water rescues. Frequent lightning impacted...
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 Webb 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 Webb 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.