An 8-year-old boy was struck and killed by a tree branch that fell while he was attending a summer camp at King Gillette Ranch in Calabasas on Wednesday afternoon, July 9, authorities said. Authorities responded just after 2:50 p.m. to the ranch in the Santa Monica Mountains. Camp staffers were giving aid to several people.

At least 27 died in one of the worst disasters ever for summer camps. The tragedy shines a spotlight on America's camps and whether they're safe.