At least 13 people were dead Friday and dozens missing after months worth of heavy rain fell in a matter of hours on Texas Hill Country, Kerr County Sheriff Larry Leitha said. The flood-prone region is dotted with century-old summer camps that draw thousands of kids annually from across the Lone Star State.

Thunderstorms and torrential rain in the United States have triggered deadly flash flooding along the Guadalupe River in south-central Texas, killing at least 13 people and leaving more than 20 girls from a summer camp missing, according to local authorities.

The US National Weather Service declared a flash flood emergency for parts of Kerr County, located about 105km northwest of San Antonio.