Weiland fire started Tuesday, only 15% contained.
A federal official says a wildfire burned power lines and is threatening homes in the remote northeastern Nevada community of Tuscarora.
Crews fighting the Carpenter 1 wildfire are getting a handle on the blaze, but full containment is not expected for some time.
A new report shows an Arizona wildfire that began with a lightning strike and caused little immediate concern because of its remote location and small size quickly grew into an inferno, leading officials to rapidly order more resources in the hours before the flames killed 19 members of an elite Hotshot crew.
Residents of evacuated canyon areas are beginning to return home.
Figures Thursday show the Carpenter 1 fire has grown to 28,000 acres.
The Bison Fire has burned over 25,000 acres. Voluntary evacuation orders have been lifted.
Firefighters gained ground in some areas, but lost it in others on Monday as they battled a vast wildfire west of Las Vegas.
Two mountain wildfires raged Tuesday in Nevada, where firefighters worked to gain the upper hand on a blaze near Las Vegas that kept hundreds of people from their homes and another southwest of Reno that jumped in size a day earlier.
Just as they were taken one at a time from the scene of their deaths, 19 firefighters killed in a wildfire a week ago will be returned to their home in the Arizona mountains on Sunday.