Fire crews have gained ground on two of the largest wildfires in California, lifting evacuation orders for about half the homes in the path of a blaze in Yosemite National Park and redeploying firefighters battling another fire in the Sierra Nevada foothills east of Sacramento. This image released by the Madera County Sheriff's Department shows a bear running through smoke in the Sierra foothills in Sierra National Forest, Calif, on Tuesday, July 29, 2014.