Flash flood alley is a curved-shaped region about 300 miles long and 50 miles wide in central/south-central Texas, extending from north of Dallas to southwest of San Antonio. Its location, weather patterns, and geology often combine to create devastating floods.

Flash floods in Texas killed at least 82 people over the Fourth of July holiday weekend and left others still missing, including girls attending a summer camp. The devastation along the Guadalupe River,

The monstrous, swift-moving flood that swept through the Hill Country of Texas killing at least 27 people and leaving many more missing, was a flash flood, the nation’s top storm-related killer