A charred tree rests on the forest floor after being sawn down to a stump Friday. Firefighters are still working to contain the Rim Fire, which is now the third-largest wildfire in California's history. Mike McMillan/U.S. Forest Service hide caption itoggle caption Mike McMillan/U.S. Forest Service The Two-Way Rim Fire Is Third-Largest Wildfire In California's History September 7, 2013 The Rim wildfire that began three weeks ago today is now 80 percent contained, officials say, but it has burned more than a quarter of a million acres, and it may continue to grow, thanks to low humidity and other conditions.