Enter any address in Blanco County, Texas to see its FEMA flood zone
Flash flooding from thunderstorms is the dominant flood character in Blanco County. Over the last 30 years, the NOAA Storm Events Database recorded 73 flash flood events, compared to 6 general flood events. Recent examples include flash flooding on May 1, 2024, and April 11, 2024, both attributed to thunderstorms producing locally heavy rain.
National Flood Insurance Program (NFIP) claims data shows that properties in Zone X and Zone X_Unshaded have experienced significant payouts and water depths, averaging $89,135 and $91,641 respectively, with water depths reaching up to 8.0 feet in Zone X. While Zone A properties have had fewer claims and lower average payouts, the presence of flash flooding suggests that homeowners in low-lying areas, near creeks and rivers, and those without a Base Flood Elevation (BFE) should pay the most attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
17 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Blanco County, Texas has recorded 79 flood-related events since 1996 according to NOAA's Storm Events Database, including 73 flash floods and 6 river or area floods. The county has received 20 federal disaster declarations, 4 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1989–2024)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Storms, Straight-line Winds, Tornadoes, And Flooding | Flood | Apr 26, 2024 |
| 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 | Apr 6, 2011 |
| Wildfires | Fire | Mar 14, 2008 |
| Extreme Wildfire Threat | Fire | Nov 27, 2005 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Nov 4, 2024 | 0.00K |
| Flash Flood | May 1, 2024 | 0.00K |
| Flash Flood | Oct 13, 2021 | 0.00K |
| Flash Flood | May 8, 2019 | 0.00K |
| Flash Flood | May 3, 2019 | 0.00K (1 deaths) |
| Flash Flood | Jun 4, 2018 | 0.00K |
| Flash Flood | May 27, 2016 | 0.00K |
| Flash Flood | Jun 2, 2016 | 0.00K |
| Flash Flood | Oct 24, 2015 | 0.00K |
| Flash Flood | May 23, 2015 | 0.00K (1 deaths) |
Flash Flood — Nov 4, 2024
A cold front moved into a very warm, moist airmass and generated thunderstorms. Temperatures in the warm sector were near record highs when the front moved through. Some of the storms produced large hail and heavy rain that led to flash flooding.
Flash Flood — May 1, 2024
A mid-level shortwave trough moved over a warm, moist airmass and generated thunderstorms. Some of these storms produced locally heavy rain that led to flash flooding.
Flash Flood — Oct 13, 2021
A complicated weather pattern developed over South Central Texas when a dryline and cold front moved out of West Texas as an upper level low moved into the Central Plains. At the same time the remnants of Pacific Hurricane Pamela moved across northern Mexico. The airmass over the region was warm and moist with near record precipitable water values. This set up led to an excessive rain episode w...
Flash Flood — May 8, 2019
Thunderstorms developed along a dryline in West Texas and moved into South Central Texas. Some of these storms produced large hail, damaging wind gusts, and heavy rain that led to flash flooding.
Flash Flood — May 3, 2019
Convection from the previous day left a number of outflow boundaries across South Central Texas. These interacted with a mid to upper level shortwave trough to trigger thunderstorms. Some of these storms produced tornadoes, large hail, damaging wind gusts, and 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 Blanco 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 Blanco 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.