Heavy rainfall and widespread flooding battered parts of Missouri on Friday, forcing the helicopter evacuations of more than 200 children and staff from a summer camp and the rescues of about 20 people who had moved to safety on a campground building that collapsed.

With nearby roads washed away and more rain in the forecast, the children were trapped at Camp Taum Sauk in the small southeastern community of Lesterville, according Sgt. Eddie Young, with the state’s highway patrol. The Army National Guard used Black Hawk helicopters to fly them to a nearby elementary school and reunite them with their families, he said.