The death toll from devastating floods in the Texas Hill Country rose to 24 Friday night, officials said, as the search for more than 20 people missing from a girls summer camp continued through the night.

Authorities have said thirteen people have died in Kerr County in the US state of Texas amid a bout of severe weather and flooding. Others remain unaccounted for - including around 20 children who had been at a summer camp.

At least 24 people were dead and many missing after torrential rains unleashed flash floods along the Guadalupe River in Texas.