Authorities stressed that the situation was still developing and that the death toll could change, with rescue operations ongoing.

Camp Mystic, a 99-year-old Christian summer camp for girls in Texas Hill Country, was hosting 750 children this week when catastrophic flooding struck the Guadalupe River early Friday, leaving at least 20 children missing.

At least 27 people have died after heavy rainfall caused flash flooding in parts of central Texas on Friday, authorities have said.