About two dozen people were still missing. Many more people could still be unaccounted for, officials warned, noting that visitors to the area for the July 4th weekend make it difficult to assess an exact number.

Emergency responders continue to search for missing people and local police said efforts have been slowed by "sightseers who are making things worse."

Although Kerr County was hit hardest by flooding, at least seven others have been confirmed dead in different parts of Texas. About 150 miles east of Camp Mystic, Travis County has confirmed at least six deaths, the county confirmed Sunday. Travis County includes the Texas capital city of Austin.