As a normal routine, these things travel almost exclusively through heavy brushland. When they take out structures it's usually those that back onto brush-filled canyon. Once the main front blows through, you're usually okay, though there's a huge amount of clean-up to do before it's out. It appears the heaviest activity from that fire is south of Alpine, and the Descanso area where the back side of the fire is creeping into town.
The good news at the moment is that winds are down and the available air resources are able to work. That's a winner!