Xavier Ramirez's family had been at a campground in Kerr County when the waters of the Guadalupe River began to quickly rise.

Rescuers searched through the night early Sunday for 27 girls missing from a riverside summer camp in Texas, after torrential rains caused devastating floods that killed at least 50 people in the US state.

Rescuers scoured flooded riverbanks littered with mangled trees Saturday and turned over rocks in the search for more than two dozen children from a girls' camp and many others missing after a wall of water blasted down a river in the Texas Hill Country.