Beyond the thousands of residential homes threatened, the fires could damage a vital television, radio and communications center and observatory on Mount Wilson. Twenty-two television stations, 25 FM radio stations and numerous cell phone providers have transmitters at the center, U.S. Forest Service Capt. Mike Dietrich told the AP.
ABC News' local affiliate KABC is among those whose antennas are threatened.
"If you receive ABC7 by off-air antenna, you could lose our ABC7 signal," the station said in an e-mail bulletin, according to the Los Angeles Times.
"It's not a matter of if it impacts Mount Wilson, it's a matter of when," L.A. County Fire Capt. Mike Savage told KABC Sunday.
The Mount Wilson Observatory, a fixture in Southern California since its founding in 1904, is responsible for discovering the existence of "countless galaxies," and is home to the world's largest publicly accessible telescope, the observatory's Web site said.
More than 50 helicopters and more than 6,400 firefighters have been mobilized to battle the blazes, but they will not be getting any help from the weather, as meteorologists predict that the dry heat will continue.
"We may have slight relief by Tuesday," Joe Sirard of the National Weather Service told the LA Times. "We may have a bigger cooldown later in the week. But that's kind of iffy. We're just not sure at this point."
For now, until Monday night, a red-flag warning is still in effect for much of Southern California as the National Weather Service predicts "afternoon gusty winds will exacerbate fire weather conditions."