At least 66 people are dead in central Texas after devastating flash floods slammed Texas Hill Country, with water rescues taking place along the Guadalupe River, which rose rapidly early Friday morning to the height of a two-story building.

Texas Gov. Greg Abbott visited the all-girls retreat Camp Mystic late Saturday as the death toll from Friday's flash flooding of the Guadalupe River continued to rise through the weekend.

Flash floods in Texas killed dozens and left an unknown number of July Fourth visitors and campers missing, including many girls attending Camp Mystic. The devastation along the Guadalupe River, outside of San Antonio,