Angela Lin, a 29-year-old Google software engineer, died after she was hit on the head by a falling tree branch at Yosemite National Park on Saturday, July 19, while hiking with her boyfriend and two friends.

Back in August 2015, two high school students were asleep in a tent in the Upper Pines Campground when an oak limb fell, killing them both. And in 2012, a concessions worker was killed when a tree fell on his tent cabin during a windstorm.