Camp Mystic, a 99-year-old Christian summer camp for girls in Texas Hill Country, was hosting 750 children this week when catastrophic flooding struck the Guadalupe River early Friday, leaving at least 20 children missing.

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.

Flooding in central Texas caused the Guadalupe River to flood. A Christian girls camp, Camp Mystic, was affected and some campers are missing.