Enter any address in Gillespie County, Texas to see its FEMA flood zone
Flash flooding from thunderstorms dominates Gillespie County's flood events. Over the last 30 years, NOAA Storm Events data shows 97 flash flood events, compared to 3 general flood events. Recent examples include flash flooding on June 11, 2025, caused by efficient rain-producing thunderstorms, and on July 9, 2025, when isolated showers and thunderstorms produced locally heavy rain.
National Flood Insurance Program (NFIP) claims data indicates that while Zone A and Unknown zones have seen fewer claims, Zone X, typically considered moderate flood risk, has had the most claims with an average payout of $11,114. Homeowners in Zone X, as well as those in areas prone to flash flooding, should pay close attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
23 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Gillespie County, Texas has recorded 100 flood-related events since 1996 according to NOAA's Storm Events Database, including 97 flash floods and 3 river or area floods. The county has received 18 federal disaster declarations, 3 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1991–2025)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Crabapple Fire | Fire | Mar 15, 2025 |
| Severe Winter Storm | Winter Storm | Jan 30, 2023 |
| 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 |
| Wildfires | Fire | Mar 14, 2008 |
| Extreme Wildfire Threat | Fire | Nov 27, 2005 |
| Hurricane Rita | Hurricane | Sep 23, 2005 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jun 11, 2025 | 0.00K |
| Flash Flood | Jul 9, 2025 | 0.00K |
| Flash Flood | Jul 6, 2025 | 0.00K |
| Flash Flood | May 29, 2023 | 0.00K |
| Flash Flood | Oct 26, 2023 | 0.00K |
| Flash Flood | May 27, 2020 | 0.00K |
| Flash Flood | Mar 21, 2020 | 10.00K (1 deaths) |
| Flash Flood | Apr 3, 2020 | 0.00K |
| Flash Flood | May 3, 2019 | 0.00K |
| Flash Flood | May 2, 2019 | 0.00K |
Flash Flood — Jun 11, 2025
A mid-level shortwave trough moved over Texas and combined with an abnormally moist airmass to generate thunderstorms. These storms were very efficient rain producers dropping locally heavy rain that led to flash flooding. There were also a few severe thunderstorms.
Flash Flood — Jul 9, 2025
A weak upper-level trough moved over Texas from the Gulf providing enough lift to generate isolated showers and thunderstorms. Some of these storms produced locally heavy rain that led to flash flooding.
Flash Flood — Jul 6, 2025
A persistent mid-level anticyclonic circulation remained over Texas and generated thunderstorms over South-Central Texas. Some of these storms produced locally heavy rain that led to flash flooding.
Flash Flood — May 29, 2023
An upper level shortwave trough generated thunderstorms in a very moist airmass. Some of these storms produced locally heavy rain that led to flash flooding.
Flash Flood — Oct 26, 2023
Thunderstorms developed along an outflow boundary in a very moist airmass. Storms were fed by strong low level winds. In addition to aiding buoyancy, these winds also contributed to significant low level wind shear. Some storms produced weak tornadoes and locally heavy rain that led to flash flooding.
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 Gillespie 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 Gillespie 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.