Fifty-nine people are dead as a result of the flooding and torrential rains in Kerr County, Texas, Sheriff Larry Leitha said during a Sunday-morning press conference. That tally includes 38 adults and 21 children, Leitha said.

Leitha also said 11 campers and one counselor remained missing from Camp Mystic, located on the banks of the Guadalupe River.

Search and rescue efforts are ongoing, Leitha said.

Kerr County Sheriff Larry Leitha provided an update on the flood damage in his area during a news conference and said the death toll rose to 43 people as of 7 p.m. ET.

"Among these who are deceased, we have 28 adults and 15 children," he said.

Leitha said five children and 12 adults are pending identification.

"I assure you we're going to do everything along with our partners, and we'll be on this till we find the last body," he said.

At least 32 people are dead, including 14 children, Texas officials said Saturday. Officials are still searching for 27 people who are missing.

"My instruction to every state official involved is to assume everybody who is missing is alive, and there's a need for speed. Not just every hour, every minute counts, which is why there's people in the air, people in the water, people at the ground right now because they're looking to save every last life and we will not give up that effort," Texas Gov. Greg Abbott said at a press conference.

Search and rescue teams are continuing to search for live victims, officials said.

Texas Gov. Greg Abbott commended rescue workers who have saved over 850 people in the last 36 hours, including people who were "clinging to trees to save their lives," he said.

"What has happened over the past 36 hours is really amazing when you look at what the local officials have done, working and collaborating with multiple state agencies as well as our federal partners," Abbott said.