Photos show scenes from the Texas floods and the summer camp where 11 children remain missing

• Torrential rain and flash floods hit parts of central Texas early Friday morning.
• Officials said that at least 59 people have died, but that they expect that number to rise.
• Eleven children remain missing from Camp Mystic, a local summer camp.

At least 59 people have died after heavy rainfall caused flash flooding in parts of central Texas on Friday.

Kerr County Sheriff Larry Leitha said in an update Sunday that 11 children from Camp Mystic, a Christian girls' camp along the Guadalupe River, remained unaccounted for. Leitha added that 38 adults and 21 children were among those who had died.

The Heart O' the Hills, another girls' camp based along the river, said its director, Jane Ragsdale, had died in the floods.

"We have received word that Jane Ragsdale did not make it," the camp said in a statement posted to its website. "We are mourning the loss of a woman who influenced countless lives and was the definition of strong and powerful."

It added that the camp was not in session as the flooding hit, and that "most of those who were on camp at the time have been accounted for and are on high ground."

Lt. Gov. Dan Patrick said the Guadalupe River rose 26 feet in 45 minutes as torrential rain battered the region.

The National Weather Service said the river reached the second-highest height on record on Friday.

The agency on Sunday extended a flood watch for parts of central Texas through 7 p.m. CT.

Here are some images showing the impact of the flooding and ongoing search and rescue efforts.