Heavy rains fell quickly in the predawn hours of Friday in the Texas Hill Country, causing the Gaudalupe River to rise 26 feet in just 45 minutes.

The National Weather Service extended a flood watch July 7 through 7 p.m. local time for much of central Texas.

The devastating floods that struck central Texas over the Fourth of July weekend have become one of the deadliest flood events in the U.S. in the past century, Newsweek previously reported. By Sunday evening, authorities had confirmed at least 82 fatalities.