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

Rescue operations are ongoing in Central Texas after flash flooding along the Guadalupe River left 23 girls from Camp Mystic unaccounted for. Officials say dozens have died as catastrophic floods continue to ravage the Hill Country.

Camp Mystic, a Christian summer camp for girls ages 7 to 17, is located along the Guadalupe River in Hunt, Texas—a community now at the epicenter of a deadly flood emergency. At least six people have died in what Governor Greg Abbott called "devastating flooding" across the Hill Country and Concho Valley.