Higher humidity and slightly lower temperatures helped firefighters inch closer to subduing the monstrous fire that has lashed about the San Gabriel Mountains for a week, but they were scrambling late Tuesday in gusty winds to keep it from over-running Mount Wilson. The reprieve from extremely dry weather had fire crews feverishly setting back fires and cutting fire lines throughout the day, bringing the fire's containment from 5 percent in the morning to 22 percent in the evening. Southwest winds largely pushed the fire deeper into the wilderness. Evacuation orders were lifted in much of La Canada-Flintridge and La Crescenta. But fire officials still worried about the northern flank of the fire, from Agua Dulce to Littlerock and said it's possible the blaze could re-emerge as a threat to homes on the eastern flank. 'It's still a very treacherous situation,' said U.S. Forest Service Incident Cmdr. Mike Dietrich. 'The fire still has a lot of potential, and it's still a big animal.' It remained particularly precarious atop Mount Wilson, home to the historic observatory and a complex of communications towers used by nearly 50 radio and television stations. By mid-afternoon, the fire was making its closest incursion to the 5710-foot peak yet, coming from two directions: one-half mile to the north and three-quarters of a mile to the west. 'We expect the fire to hit the Mount Wilson facilities between 5 p.m. today and 2 a.m. Wednesday morning,' said Los Angeles County Fire Department Deputy Chief James Powers, at his command post at the observatory. 'Right now, we're conducting controlled burns around the perimeter in preparation for the impending fire's arrival. We're also bringing in trucks and special equipment to coat all of the structures with protective gel and foam if necessary.' The controlled burns cloaked the mountaintop with acrid smoke. Chainsaws roared in all directions. Workers unloaded earthmovers from flatbed trucks. Fire officials on Monday morning -- the day after two firefighters were killed near Acton when their truck overturned -- decided to remove crews from the mountain for safety reasons. They re-strategized Tuesday and decided to send them back, but only if the complex was in imminent danger. 'That time is now,' Powers said. Fire was making runs on the narrow, hairpin road that connects to the Angeles Crest Highway, as boulders and rocks fell down on the pavement from burned-out hillsides above. Los Angeles County Fire Department Battalion Chief Steve Martin said, 'We are going to burn, cut, foam and gel. And if that doesn't work, we're going to pray. This place is worth a lot, but it's not worth dying for.' Firefighters planned to retreat to the safety of the observatory parking lot or seek refuge in the concrete and steel basement of the telescope dome. At least one group of mountain residents wished they got as much attention from firefighters as the observatory did. On Tuesday evening, residents in remote enclave called Chilao were taking stock of their losses. Three of four 80-year-old homes were destroyed. For decades, California Department of Transportationo workers had lived there alongside Angeles Crest Highway, about 10 miles east of Mount Wilson, and kept the highway free of debris, rocks and snow for the benefit of thousands of people who recreate at the top of the Angeles National Forest year round. 'We were left on our own here,' said equipment operator Robert Torres, whose home was the only residence spared. 'At one point, there was a helicopter flying overhead with a bladder full of water and not dropping. What does that tell you?' So far the fire, whose cause is under investigation, has chewed through 127,500 acres of wilderness and destroyed 62 residences. While the number of structures it has destroyed is small compared to other recent wildfires, this one has ripped an enormous hole in one of Southern California's most treasured wilderness areas, a fact that was particularly evident along Angeles Crest Highway, which remained closed to the public traffic. Under skies tinged coral and gray by dense smoke, mile after mile of slope once covered with manzanita, sumac, sycamore and pine trees looked like black dunes. Charred remains of squirrels and rodents lay by the road. Joe Young, 63, who has hiked the San Gabriels for 39 years, said the burned area contains many of Southern California's most popular hiking trails. 'It's very sad,' said Young, a member of the Sierra Club's 100-peaks group. 'In just the burned area so far, we have about 40 peaks that club goes to regularly, if not every week.' Meteorologists said the humidity should continue to rise over the next few days, with temperatures dropping -- but slowly. Fire officials don't predict full containment until Sept. 15. 'This was like the Jabba the Hut fire,' said Bill Patzert, a climatologist for the Jet Propulsion Laboratory in La Canada-Flintridge. 'It's menacing and big, but it definitely can't move that fast.' Patzert said the foothill communities 'dodged a bullet' in that this fire didn't erupt during Santa Ana winds. 'This could have been like the conflagration of the century with the Santa Anas,' he said. On Haines Canyon Avenue in Tujunga, Lisa Martin stood in front of her house, chatting with neighbors as ash rained down and flames scoured the hill above her home. She was actually happy to see the foliage burn before the Santa Anas come. 'Let it burn. Get rid of the fuel.' The outlook also improved Tuesday in San Bernardino County, where firefighters gained the upper hand on the Oak Glen III and Pendelton fires Tuesday. 'If it stays like this I expect an easier day tomorrow,' said Bill Peters, spokesman for the California Department of Forestry and Fire Protection. 'We may be able to release some of our resources.' Times staff writers David Kelly in Yucaipa, Ann M. Simmons, Rong-Gong Lin II, Hector Becerra, My-Thuan Tran, Victoria Kim, Kimi Yoshino, Garrett Therolf, Ruben Vives, Raja Abdulrahim and Alexandra Zavis contributed to this report. 