126
Recorded events
15
Direct deaths
127
Direct injuries
$216.5M
Property damage
Flash Flood in Hays County, Texas: 126 recorded events between 1997 and 2025. The strongest on record measured 0. That places the county #108 nationally and #17 statewide for this hazard.
Decade by decade
Flash Flood in Hays County, Texas: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flash flood in Hays County is the 2000s, when 50 of the county's 126 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.
Within the Hays County archive, flash flood makes up 28.1% of all recorded severe weather across 7 hazard types. Nationally the county sits at #108 for this hazard and #17 within Texas, putting it in the 96.5 percentile of all U.S. counties.
Seasonality
Events by month
Jun is the peak month for flash flood in Hays County with 26 recorded events, while Dec is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.
Significant events
Deadliest on record
| Date | Location | Scale | Deaths | Injuries | Damage |
|---|---|---|---|---|---|
| May 24, 2015 | WIMBERLEY | 0 | 10 | 0 | $100.0M |
| Jun 9, 1997 | COUNTYWIDE | 0 | 2 | 7 | $2.5M |
| May 3, 2019 | DRIPPING SPGS | 0 | 1 | 0 | $0 |
| Mar 12, 2007 | WIMBERLEY | 0 | 1 | 0 | $0 |
| Nov 15, 2004 | SAN MARCOS | 0 | 1 | 0 | $0 |
| Oct 17, 1998 | COUNTYWIDE | 0 | 0 | 100 | $500K |
| Nov 15, 2001 | COUNTYWIDE | 0 | 0 | 20 | $200K |
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Jun 12, 2025 | SAN MARCOS LOWMAN AR | 0 | $0 |
| Jun 12, 2025 | SAN MARCOS LOWMAN AR | 0 | $0 |
| Jun 12, 2025 | WIMBERLEY | 0 | $0 |
| Jan 22, 2024 | DRIFTWOOD | 0 | $0 |
| Oct 26, 2023 | SAN MARCOS LOWMAN AR | 0 | $0 |
| Oct 26, 2023 | SAN MARCOS LOWMAN AR | 0 | $0 |
| Oct 26, 2023 | SAN MARCOS | 0 | $0 |
| Oct 26, 2023 | KYLE | 0 | $0 |
| Oct 14, 2021 | SAN MARCOS | 0 | $0 |
| Oct 14, 2021 | BUDA | 0 | $0 |
Other hazards here
More from Hays County
- Hail 176
- Thunderstorm Wind 105
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Between 3 and 5 inches of rain fell across northwest Hays county with the heaviest rainfall observed near Henley. Flash flooding closed FM12, FM165, and FM150. A man was traveling northward in his truck toward Dripping Springs when it was swept into Onion Creek. He was unable to make it to safety and drowned.
The Blanco River rose to above bankfull stage late on the evening of November 14, but remained below flood stage. Two people attempted to drive through a low water crossing on Post Oak Road where the Blanco River crosses just south of Kyle. The car was swept into the river and washed downstream. The man was rescued after catching on to a tree. The woman also caught on to a tree but lost her grip and was swept away and drowned.
Thunderstorms produced heavy rain that caused flash flooding sending water over the Hwy 12 bridge at Cypress Creek in Wimberley. Rainfall totals from that morning totaled over 10 inches, much of that rain coming in only a few hours time. Several businesses in downtown Wimberley along Cypress Creek were flooded and damaged. The Blanco River was just a few feet short of overtopping the Highway 12 bridge.
Quick answers
Frequently asked
How many flash flood events are on record in Hays County, Texas?
126 flash flood events are recorded in Hays County between 1997 and 2025, causing 15 direct deaths.
What is the strongest flash flood recorded in Hays County?
The strongest flash flood on record in Hays County measured 0.
Where does the flash flood data for Hays County come from?
All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.
Cite this page
“Flash Flood in Hays County, Texas.” Severe Weather History. severeweatherhistory.com/county/texas/hays-county/flash-flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.