At least 50 people are dead in central Texas after devastating flash floods slammed Hill Country, with water rescues taking place along the Guadalupe River. While officials couldn't confirm an exact number of those who remain unaccounted for,

According to the National Weather Service, a flash flood is flooding that begins within six hours, and often in as little as three hours, of heavy

The destructive fast-moving waters rose 26 feet (8 meters) on the Guadalupe River in just 45 minutes before daybreak Friday, washing away homes and vehicles.