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.

Flash floods swept through Texas over the Fourth of July weekend, leaving more than 90 people dead. Dozens remain missing.

As first responders continue to rescue people stranded by the torrential flooding that descended on central Texas Friday, dozens of people are facing a parent’s worst nightmare: Their children are missing.