"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.

At least 59 people were killed by the flooding in Kerr County, Sheriff Larry Leitha said. At least 11 additional deaths were confirmed in surrounding counties, pushing the storm's overall toll to at least 70. That surpassed the estimated 68 deaths directly caused by Hurricane Harvey in southeast Texas in 2017.

With more rain on the way, the risk of life-threatening flooding was still high in central Texas on Monday even as crews search urgently for the missing following a holiday weekend deluge that killed at least 82 people,