Giant sequoias in Yosemite National Park have survived their first wildfire in more than a century because of intentional burning to remove undergrowth beneath the towering trees. Prescribed burns have proven to be effective methods to help prevent wildfires.
YOSEMITE NATIONAL PARK, Calif. (AP) A wildfire threatening the largest grove of giant sequoias in Yosemite National Park more than doubled in size in a day, and firefighters were working in difficult terrain Sunday to protect the iconic trees and a small mountain town as the U.S.