The Bobcat fire in Los Angeles County has grown to nearly 100,000 acres, and continues to threaten the historical Mt. Wilson Observatory in the San Gabriel Mountains.

This is one of the largest fires ever recorded in the county; the biggest blaze, 2009's Station fire, burned 160,000 acres in the Angeles National Forest. The Bobcat fire is only 15 percent contained, and is moving through communities in the Antelope Valley, the Los Angeles Times reports. There are more than 1,600 firefighters on the scene, with some coming from as far away as New York.

"We're still in the thick of a good firefight," Andrew Mitchell, public information officer with the U.S. Forest Service, said on Sunday. There were some flare-ups around Mt. Wilson Observatory overnight, but crews were able to stamp them out. Forecasters expect lower temperatures and calmer winds over the next few nights, and Mitchell said he thinks "the next couple days we'll start to really get a handle on this fire because the conditions will be right and we'll be able to really start backing it with all our assets."

There are 27 major wildfires now burning in California, the state's Department of Forestry and Fire Protection said on Sunday. Since mid-August, blazes in the state have killed 26 people and destroyed more than 6,100 structures. Catherine Garcia