LAS VEGAS — Firefighters awoke to cloudy skies with hopes that rain will help them corral a massive wildfire that has charred almost 44 square miles in the mountains near Las Vegas and continues to threaten 400 homes, a hotel and a scenic alpine lodge.

U.S. Forest Service spokeswoman Suzanne Shelp said Thursday that rain could be a mixed blessing for the more than 1,200 personnel carving fire lines in and around woodsy canyon hamlets on Mount Charleston.

Too little won't help. Too much could cause mudslides in burned areas. And lightning could spark new fires.

The Carpenter 1 blaze started with a lightning strike July 1. It's now 15 percent contained

Five structures at a remote ranch and one commercial building at Prospect Springs burned Tuesday.

Two people have received minor injuries.