An estimate of 20 girls remained missing after deadly flooding caused “destructive” floods at Camp Mystic in Hunt, Texas, Lt. Gov. Dan Patrick said.

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

Camp Mystic — where a frantic search is underway for survivors of a catastrophic flood — has been a destination for the daughters of Texas’s political elite since it was founded in 1926.