Lower Colorado River Authority They call our region Flash Flood Alley for a reason. Water here can rise quickly and cut off escape routes, tear homes from foundations, and rip up even the sturdiest of trees and send them barreling downstream. Lake Travis rose more than 50 feet in a day during a 1952 flash flood, and just last year Central Texas experienced deadly flooding on Memorial Day, then again over Halloween. We don’t see those kinds of floods often, but when we do, the damage can be ca ...