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.