Firefighters worked to make gains against Southern California wildfires as an intense heat wave eased slightly on Tuesday.
Two adjacent fires in the San Gabriel Mountains, 20 miles north-east of Los Angeles, remained uncontained but had not destroyed any homes while their combined size grew to more than eight square miles.
About 770 homes in the foothill city of Duarte were under evacuation orders and residents of Bradbury and Monrovia just to the west were urged to be ready to leave immediately if given the word.
"Our big threat today is still that left side of the fire, the west flank," said Los Angeles County Deputy Fire Chief John Tripp. "There's a fire line that goes from the bottom of the slope all the way up to the top of the mountain."
A 4am wind shift started bringing the fire down the mountains but a helicopter making night-time water drops slowed the advance. Significant progress, however, was made overnight on the east side of Duarte, where flames creeped down to the bottom of slopes behind homes and firefighters extinguished them.
The other fire in what was dubbed the San Gabriel Complex forced evacuation of 69 people.
The fires erupted separately on Monday and scared homeowners before burning mostly away from the cities.
Charlie Downing, out of breath and with his shirt off because of the heat, said when he first smelled fire and felt heat that he ran outside of his house and was astonished by the size and nearness of the flames.
"I came running over just to look and it was 15 to 20 feet in the air," Mr Downing told reporters. "By the time I came back and told my grandma and my kids to get in the car, it was right by the car."
He and two neighbours sprayed the flames with their yard hoses until firefighters arrived minutes later.
Two towering columns of smoke rose from the mountain range, reminiscent of a 2009 fire that scorched 250 square miles of the Angeles National Forest as it burned for weeks.
Elsewhere, crews made progress against a week-old blaze in rugged coastal mountains west of Santa Barbara, boosting containment to 70 percent.
About 270 homes and other buildings were threatened by the blaze, which has charred more than 12 square miles since Wednesday. Authorities planned to begin lifting mandatory evacuations there on Wednesday.
Another wildfire in the desert close to the Mexico border south-east of San Diego was holding at nearly 12 square miles after forcing the evacuation of about 75 people from a ranching community.
Other blazes burned wide swaths across Arizona and New Mexico, where firefighters also faced blistering heat.
In New Mexico, a 28-square-mile fire that erupted last week and destroyed 24 homes in the mountains south of Albuquerque showed signs of slowing down. Higher humidity has allowed crews to strengthen lines, and some evacuees would be allowed to return home on Tuesday.
In eastern Arizona, a fire doubled to nearly 42 square miles and led officials to warn a community of 300 residents to prepare to evacuate. The blaze on the Fort Apache Indian Reservation was not moving quickly toward the community of Cedar Creek because of sparse vegetation and shifting winds.
"An emu runs to escape an approaching wildfire as it burns near Potrero, California" (Mike Blake/Reuters) pic.twitter.com/LOzdW10Jl7— pourmecoffee (@pourmecoffee) June 21, 2016