(CNN) -- Firefighters in northeastern California braced for "extreme behavior" Sunday from a wildfire that burned one residence and at least two outbuildings.
"Outflow" winds of 50 miles per hour were expected in the area of the 250-acre blaze in Lassen County, according to a news release from the Sierra Front Interagency Dispatch Center, and "abundant lightning" was forecast for the area.
Todd Chaponot, fire information officer for the center, said the fire was 30 percent contained Sunday and fewer than a dozen homes remained threatened. About 160 personnel were working on the fire, dubbed the Constantia fire, he said.
South of the Constantia fire, another blaze called the Potato fire, five miles east of Bridgeport, California, was covering 525 acres, burning grass and sage brush but not threatening any structures, Chaponot said. With 125 personnel on it, the fire was 20 percent contained, he said.