The Meadow Fire burns near Half Dome in Yosemite National Park, California, in this handout photo released to Reuters on September 8, 2014. The so-called Meadow Fire, which flared out of control on Sunday afternoon, stranded 85 hikers on top of Half Dome, the park's signature rock formation, requiring them to be flown out by helicopter, Yosemite spokeswoman Ashley Mayer said. (Photo by Jeffrey Trust/Reuters/National Park Service)

In this Sunday, September 7, 2014 photo provided by Rachel Kirk, hikers are evacuated from Yosemite National Park, Calif. About 100 Yosemite National Park visitors were evacuated from the top of Half Dome by helicopter Sunday when a wildfire that started weeks ago in the park's backcountry grew unexpectedly to at least 700 acres, officials said. (Photo by Rachel Kirk/AP Photo)

In this Sunday, September 7, 2014, photo provided by Rachael Kirk, climbers view a wildfire from the top of Half Dome in Yosemite National Park, Calif. (Photo by Rachel Kirk/AP Photo)

A wildfire burns next to Half Dome in Yosemite National Park, Calif, Sunday, September 7, 2014. As of Monday, the fire has burned through about four square miles. (Photo by AP Photo/Michaelfrye.com)

In this Sunday, September 7, 2014 photo provided by Rachel Kirk, hikers take photos of smoke from a fire rising above Little Yosemite Valley near Yosemite National Park, Calif. (Photo by Rachel Kirk/AP Photo)

This Sunday, September 7, 2014 photo provided by Rachel Kirk shows smoke from a fire rising above Little Yosemite Valley near Yosemite National Park, Calif. (Photo by Rachel Kirk/AP Photo)

The Meadow Fire burns in Yosemite National Park, California in this handout photo released to Reuters September 8, 2014. (Photo by Jeffrey Trust/Reuters/National Park Service)

In this Sunday, September 7, 2014, photo provided by Michael Frye, a wildfire burns next to Half Dome in Yosemite National Park, Calif. As of Monday, the fire has burned through about four square miles. (Photo by AP Photo/Michaelfrye.com)