Some parents were notified on Friday that their daughters at Camp Mystic, an all-girls Christian summer camp, had gone missing after devastating flash floods tore through south-central Texas.

The area is home to many summer camps, and Texas Lt. Gov. Dan Patrick said at least 20 girls are missing from Camp Mystic. He said families whose daughters are unaccounted for have been notified; parents who have not been contacted by the camp should know their daughters are safe, he stressed.