Enter any address in McMullen County, Texas to see its FEMA flood zone
Flash flooding from heavy rainfall events dominates McMullen County's flood character. Over the last 30 years, NOAA Storm Events data shows 22 flash flood events compared to 7 general flood events. Recent examples include flash flooding on August 15, 2022, caused by widespread heavy rainfall, and major river flooding along the Nueces River that flowed into McMullen County from August 17-24, 2022, following heavy rains in Webb and Duval Counties.
Further instances of river flooding occurred in October 2018, when a flood wave reached McMullen County after heavy rains over the Upper Nueces River watershed. Homeowners in areas designated as Zone A, which have experienced National Flood Insurance Program claims, should pay particular attention to their flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
6 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
McMullen County, Texas has recorded 29 flood-related events since 1996 according to NOAA's Storm Events Database, including 22 flash floods and 7 river or area floods. The county has received 16 federal disaster declarations, 1 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1967–2021)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| 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 |
| Tropical Storm Alex | Hurricane | Jun 27, 2010 |
| Wildfires | Fire | Mar 14, 2008 |
| Extreme Wildfire Threat | Fire | Nov 27, 2005 |
| Hurricane Rita | Hurricane | Sep 23, 2005 |
| Hurricane Katrina Evacuation | Hurricane | Aug 29, 2005 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | Aug 18, 2022 | 0.00K |
| Flash Flood | Aug 15, 2022 | 0.00K |
| Flood | Sep 20, 2018 | 0.00K |
| Flood | Oct 20, 2018 | 0.00K |
| Flood | Oct 2, 2017 | 50.00K |
| Flash Flood | Sep 25, 2016 | 0.00K |
| Flash Flood | Aug 20, 2016 | 0.00K |
| Flash Flood | May 15, 2015 | 0.00K |
| Flood | Oct 18, 2013 | 50.00K |
| Flash Flood | Mar 28, 2012 | 0.00K |
Flood — Aug 18, 2022
Very heavy rainfall occurred over Webb and Duval Counties associated with a tropical low pressure system on the 15th and 16th. Flood wave that originated in San Casamiro Creek in Webb County flowed into the Nueces River, Major river flooding occurred from southeast La Salle County through McMullen County to Live Oak County from the 17th through the 24th.
Flash Flood — Aug 15, 2022
As the tropical disturbance moves west into the Brush Country on the 15th, bands of showers and thunderstorms produced very heavy rainfall. This caused flash flooding in the Laredo area and over portions of the Brush Country. Rainfall estimates of 5 to 8 inches were widespread across the Brush Country with localized amounts of 10 to 15 inches over western Duval County and southwest Webb County.
Flood — Sep 20, 2018
Heavy rains across Nueces County caused major flooding along Oso Creek on the 16th. Heavy rains across the Brush Country led to flooding along the Nueces River by the latter part of the month. Nueces River reached major flood stage near Tilden on the 21st.
Flood — Oct 20, 2018
A couple of episodes of locally heavy rain on the 7th and 15th over the Upper Nueces River watershed provided periods of major flooding on the Nueces River. The flood wave reached McMullen County during the latter half of the month of October.
Flood — Oct 2, 2017
Torrential rainfall fell across the western Brush Country from September 26th through the 28th. Generally, 5 to 10 inches of rain fell during the period with some areas over northern Webb County into eastern Dimmit County received from 15 to 20 inches of rain. This caused major flooding on the Nueces River affecting portions of La Salle County during the last several days of September and conti...
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 McMullen 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 McMullen 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.