Rescue operations are ongoing in Central Texas after flash flooding along the Guadalupe River left 27 dead and 10 girls and one counselor unaccounted for at Camp Mystic. Officials said more than 90 have died as catastrophic floods ravaged the Hill Country.

Three days after cataclysmic floods tore through a stretch of the Texas Hill Country, officials have confirmed the deaths of 27 children and counselors who had been missing from a girls’ summer camp.

Matthew Gant said 14-year-old Mary Steele Gant was at Camp Mystic in central Texas when the camp was overwhelmed by flash flooding, WMC Action News 5 reported. Rain overwhelmed the Guadalupe River on July 4, causing it to rise as much as 26 feet in less than two hours.