"Camp Mystic is grieving the loss of 27 campers and counselors following the catastrophic flooding on the Guadalupe River," the camp said in a statement.

Catastrophic flooding struck central Texas on Friday as the Guadalupe River surged by more than 20 to 26 feet within 90 minutes, causing widespread devastation and forcing mass evacuations in Texas Hill Country. At least 80 people have been killed in the floods while others remain missing or displaced and more than 850 people required rescuing.

As of early Monday, 81 people died across six counties. Sixty-eight died in Kerr County alone, 40 were adults and 21 were children. Authorities said about 850 people had been rescued or evacuated. There are still 10 Mystic Camp campers and one camp counselor missing.