2015 Texas–Oklahoma flood and tornado outbreak

Preceded by more than a week of heavy rain, a slow-moving storm system dropped tremendous precipitation across much of Texas and Oklahoma during the nights of May 24–26, 2015, triggering record-breaking floods. Additionally, many areas reported tornado activity and lightning. Particularly hard hit were areas along the Blanco River in Hays County, Texas, where entire blocks of homes were leveled. On the morning of May 26, the National Weather Service issued a flash flood emergency for southwest Harris County (which includes the city of Houston) and northeast Fort Bend County. The system also produced deadly tornadoes in parts of Mexico, Texas, and Oklahoma. This flood significantly contributed to the wettest month ever for Texas and Oklahoma.

2015 Texas–Oklahoma flood and tornado outbreak
Hydrograph of the Blanco River at Wimberley, Texas depicting the record flood event during the overnight of May 24–25
TypeExtratropical cyclone
Tornado outbreak
Flood
FormedMay 22, 2015
DissipatedMay 25, 2015
Tornadoes
confirmed		75
Max. rating1EF3 tornado
Fatalities30 total fatalities:
  • 10 from flooding in Texas
  • 4 from flooding in Oklahoma
  • 14 from a tornado in Ciudad Acuña, Mexico
  • 1 from a tornado near Cameron, Texas
  • 1 from a tornado near Blue, Oklahoma
  • 11 missing from flooding in Texas
Damage$3 billion (2015 USD)
Areas affectedMexico, Great Plains, Southern United States
Part of the Tornadoes of 2015 and Floods in the United States during 2015

1Most severe tornado damage; see Enhanced Fujita scale
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