The heavy rain that turned a river in Texas into a raging wall of water was fueled by unique atmospheric conditions, according to meteorologists and climate scientists.

Heavy rains fell quickly in the predawn hours of Friday in the Texas Hill Country, causing the Gaudalupe River to rise 26 feet in just 45 minutes.

Local officials warned the number of dead will likely rise and were due to give an update on Sunday morning, as search and rescue teams raced to find 27 girls missing from a camp near the Guadalupe River,