Enter any address in Johnson County, Texas to see its FEMA flood zone
Flash flooding from thunderstorms is the dominant flood character in Johnson County, TX. Between 2000 and 2023, NOAA Storm Events data recorded 105 flash flood events and 12 general flood events, with flash flooding resulting in 4 fatalities. For example, flash flooding occurred in July 2025 due to slow-moving thunderstorms and a saturated atmosphere, and again in January 2025 from multiple rounds of heavy rain.
FEMA's National Flood Insurance Program (NFIP) data shows that properties in Zone A, typically areas with higher flood risk, accounted for the largest number of claims (147) with an average payout of $9,371 and an average water depth of 3.4 feet. However, properties in Zone X, which are generally considered to have moderate to minimal flood risk, had a higher average payout of $25,101, with an average water depth of 4.2 feet, indicating significant flood damage can occur even in these areas.
Homeowners in Zone A, as well as those in Zone X where substantial damage has been recorded, should pay close attention to flood risk. Residents in areas that have experienced frequent flash flooding events should also be particularly aware of their flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
24 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Johnson County, Texas has recorded 117 flood-related events since 1996 according to NOAA's Storm Events Database, including 105 flash floods and 12 river or area floods. The county has received 19 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 (1989–2021)
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 |
| 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 |
| Huntington Brook Fire | Fire | Jan 17, 2006 |
| 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 |
|---|---|---|
| Flash Flood | Jan 30, 2025 | 5.00K |
| Flood | Feb 12, 2025 | 0.00K |
| Flash Flood | May 6, 2025 | 0.00K |
| Flash Flood | Jul 6, 2025 | 0.00K |
| Flash Flood | May 30, 2024 | 0.00K |
| Flash Flood | May 5, 2024 | 20.00K (1 deaths) |
| Flash Flood | May 5, 2024 | 500.00K |
| Flash Flood | May 4, 2024 | 0.00K |
| Flash Flood | Aug 22, 2022 | 0.00K |
| Flash Flood | May 24, 2021 | 50.00K |
Flash Flood — Jan 30, 2025
A slow moving upper low generated multiple rounds of rain, some heavy, the night of January 29 into the morning of January 30 across North Texas. Much of the heavy rain and associated flooding occurred in and near the DFW Metroplex.
Flood — Feb 12, 2025
Moderate to heavy rain in Johnson County impacted a lane of I-35W in the Burleson area.
Flash Flood — May 6, 2025
A sharp upper trough and a meandering surface front generated two rounds of thunderstorms across the region, one round on May 5 and the other on May 6. Most of the severe weather took place on the 6th, when large hail, damaging winds, and a few tornadoes occurred. A total of 5 tornadoes were surveyed in the far southeast parts of the County Warning Area: two EF-0s and three EF-1s. The strongest...
Flash Flood — Jul 6, 2025
From the July 4th weekend into the early part of the following week, a weak upper trough lingered over North and Central Texas, triggering several days of scattered showers and thunderstorms. A saturated atmosphere combined with slow storm motions resulted in numerous flash flooding events throughout the region, particularly in Central Texas.
Flash Flood — May 30, 2024
Another complex of thunderstorms moved southeast through North and Central Texas during the day on May 30, producing scattered wind damage and severe hail along with some flash flooding. A second round of storms initiated along the dryline Thursday evening, producing more severe weather and flash flooding overnight into the early morning hours of May 31. After above normal rainfall throughout t...
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 Johnson 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 Johnson 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.