A t least 66 people are dead in central Texas after devastating flash floods slammed Texas Hill Country, with water rescues taking place along the Guadalupe River. A dozen are still missing from Camp Mystic in Kerr County, a children's summer camp, officials said Sunday.

As authorities launch one of the largest search-and-rescue efforts in recent Texas history, they have come under intensifying scrutiny over preparations and why residents and youth summer camps that are dotted along the river were not alerted sooner or told to evacuate.