Rescue operations are ongoing in Central Texas after flash flooding along the Guadalupe River left 23 to 25 girls from Camp Mystic unaccounted for. Officials say dozens have died as catastrophic floods continue to ravage the Hill Country.

The youngest girls at Camp Mystic in Texas were asleep in cabins as little as 225 feet from the river when flash flooding suddenly surged — causing the water to rise 20 feet above flood stage in just 90 minutes, starting around 4 a.m. on July 4.