Rescuers and volunteers were scouring for survivors Monday as others prayed after catastrophic flooding in Texas left at least 90 people dead, including more than two dozen children, officials said.

At Camp Mystic, a Christian summer camp in Hunt, Texas, where officials are grieving the loss of 27 children and counselors, belongings of the young campers were strewn about the flooded floors of a dormitory, while other items, including a pink backpack and a Camp Mystic T-shirt, were found along the bloated Guadalupe River, photos show.

The camp is on the banks of the river, which swelled during heavy rain early Friday and surged by more than 20 feet in an hour, authorities said. The storm downed power lines and trees and swept away vehicles.

The water rushed into Kerr County, where Sheriff Larry Leitha said at least 48 adults and 27 children were found dead.

See photos of the storm’s devastation and efforts to find survivors: