A wildfire scorching its way through brush and timber from the mountains to the desert northeast of Los Angeles threatened more than 1,000 homes on Tuesday as crews across the West battled dozens of other major blazes.

The Bobcat Fire was advancing at a mile or two an hour at times and continued to threaten the Mojave Desert town of Pearblossom after burning into the Antelope Valley foothill area, on the other side of the San Gabriel Mountains from Los Angeles.

The blaze that began September 6 destroyed or damaged at least 29 homes and other buildings, including some in the Juniper Hills area, with the toll rising to perhaps 85 when damage assessment teams can complete their work this week, authorities said.

Firefighters also battled flareups near Mount Wilson, which overlooks greater Los Angeles and has a historic observatory founded more than a century ago and numerous broadcast antennas serving Southern California.

Near Mount Wilson, firefighters set more than a mile of fires designed to burn out the blaze’s fuel and act as a brake on its advance.