CONIFER, Colo. (AP) — Crews are hoping that newly arrived reinforcements will help in the fight against a wildfire that has destroyed dozens of homes in the mountains southwest of Denver and may have claimed two lives.

About 400 firefighters are at the 7-square-mile fire on Wednesday, focusing on building containment lines around the perimeter.

A search team also is using dogs to look for a woman missing in the fire zone. Her home was among 28 destroyed or damaged in the blaze, which started Monday.

Authorities believe it was likely sparked by a controlled burn set last week to clear vegetation in the hopes of preventing a wildfire.