Camp Mystic, a private Christian summer camp for girls, had to be evacuated overnight after “catastrophic” flooding along the Guadalupe River.

Lt. Gov. Dan Patrick said Friday during a press conference that about 23 girls were still missing after major flooding at a private Christian summer camp in Hunt.

The mother of one missing Camp Mystic camper said in a message on Saturday morning that her daughter had died. Her death comes in the midst of devastating flooding in Kerr County, Texas, where more than 20 campers are still missing.