The death toll has risen to 24 after heavy rain pounded Kerr County, Texas, early Friday, leading to deadly and "catastrophic" flooding, the sheriff said.

Months worth of heavy rain fell in a matter of hours on Texas Hill Country, leaving 24 people dead and many more unaccounted for Friday, including more than 20 girls attending a summer camp, as search teams conducted boat and helicopter rescues in fast-moving floodwaters.