Enter any address in Tom Green County, Texas to see its FEMA flood zone
Flash flooding from intense thunderstorms dominates the flood risk profile in Tom Green County. Over the last 30 years, the NOAA Storm Events Database recorded 138 flash flood events, resulting in 1 death, alongside 20 general flood events and 1 tropical depression. Historic flash flooding occurred in northern and northeast San Angelo on July 4, 2025, driven by abundant tropical moisture from the remnants of Tropical Storm Barry and a weak upper-level storm system that produced 10 to 16 inches of rain, numerous water rescues, and flooded streets and houses. Severe thunderstorms on April 19, 2025, caused by a stationary front, surface dryline, and upper-level low-pressure system, also brought severe weather and redeveloping thunderstorms to the Concho Valley.
National Flood Insurance Program claims data demonstrates risk across multiple zones. Zone A properties experienced 118 claims with an average payout of $57,191 and an average recorded water depth of 19 inches. Zone X properties recorded 57 claims with an average payout of $30,260 and an average water depth of 20 inches. Additionally, Zone X_UNSHADED recorded 17 claims averaging a $1,354 payout and 1 inch of water depth, Zone X_SHADED recorded 8 claims averaging $0 and 2 inches of water depth, and Zone UNKNOWN recorded 6 claims averaging a $15,207 payout and 2 inches of water depth. Homeowners and real estate agents in high-risk designated areas, as well as those outside standard high-risk zones, should pay close attention to these patterns given the severe historical impacts of flash flooding.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
52 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Tom Green County, Texas has recorded 159 flood-related events since 1996 according to NOAA's Storm Events Database, including 138 flash floods and 20 river or area floods. The county has received 21 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 (1990–2025)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Storms, Straight-line Winds, And Flooding | Flood | Jul 2, 2025 |
| Severe Winter Storm | Severe Ice Storm | Feb 11, 2021 |
| Severe Winter Storms | Severe Ice Storm | Feb 11, 2021 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms, Tornadoes, Straight-line Winds And Flooding | Severe Storm | May 4, 2015 |
| Wildcat Fire | Fire | Apr 11, 2011 |
| Wildfires | Fire | Apr 6, 2011 |
| Hurricane Ike | Hurricane | Sep 7, 2008 |
| Hurricane Gustav | Hurricane | Aug 27, 2008 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | May 29, 2025 | 0.00K |
| Flood | Apr 19, 2025 | 0.00K |
| Flash Flood | May 6, 2025 | 0.00K |
| Flash Flood | Jul 4, 2025 | 0.00K (1 deaths) |
| Flash Flood | Jun 3, 2025 | 0.00K |
| Flash Flood | Aug 31, 2024 | 0.00K |
| Flash Flood | May 23, 2024 | 0.00K |
| Flood | Nov 8, 2024 | 0.00K |
| Flash Flood | Nov 8, 2024 | 0.00K |
| Flash Flood | Nov 7, 2024 | 0.00K |
Flash Flood — May 29, 2025
The combination of an upper level area of low pressure and a stationary frontal boundary in the area, resulted in many rounds of strong to severe thunderstorms across west central Texas during late May. In addition, strong to locally extreme surface instability along with strong vertical wind shear assisted with the development of severe thunderstorms. A few of the severe storms produced very ...
Flood — Apr 19, 2025
The combination of a stationary front, surface dryline and an upper level low pressure system to the west resulted in many severe thunderstorms developing on the afternoon and evening along the stationary front on April 19th. Also, moderate to strong instability and strong vertical wind shear helped with the severe storm development. The severe storms produced very large hail and damaging winds...
Flash Flood — May 6, 2025
A few severe thunderstorms produced large hail in portions of the Concho Valley and northern Edwards Plateau as well as flash flooding in the city of San Angelo.
Flash Flood — Jul 4, 2025
Devastating and historic flash flooding occurred in northern and northeast portions of San Angelo, with numerous water rescues, many streets and houses completely flooded, and 1 fatality. The combination of abundant tropical moisture associated with the remnants of Tropical Storm Barry and a weak upper level storm system, led to very slow moving or stationary thunderstorms producing very heavy ...
Flash Flood — Jun 3, 2025
Heavy rainfall caused flash flooding during the early morning hours June 3rd.
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 Tom Green 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 Tom Green County, Texas that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with a mortgage from a federally regulated or insured lender, or a federally backed loan, 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.