More wildfires breaking out.

South California has been hit with a heatwave (37C), and outbreaks of wildfires.

Ten miles away firefighters have made progress against the nearly week-old blaze in rugged coastal mountains west of Santa Barbara.

Overnight winds pushed flames into previously burned areas, allowing firefighters to boost containment to more than 50 percent.

Most mandatory evacuations will be lifted Wednesday morning.

About 270 homes and other buildings were threatened by the blaze, which has charred more than 12 square miles since last Wednesday.

But new wildfires erupted today (Monday) near Los Angeles and chased people from their suburban homes as an intense heatwave stretching from the West Coast to New Mexico blistered the region.

Towering columns of smoke rose from the San Gabriel Mountains as two fires burning less than 2 miles apart devoured brush on steep slopes above foothill suburbs.

Police in the city of Azusa and parts of Duarte ordered several hundred homes evacuated.

Another wildfire was growing near Potrero, a small desert town close to the Mexico border. It surged to nearly 3 square miles amid triple-digit temperatures and forced the evacuation of about 75 people from the ranching community about 40 miles southeast of San Diego.

Three firefighters suffered heat-related injuries and were taken to a hospital for evaluations.

Other blazes burned wide swaths across Arizona and New Mexico, where firefighters also faced blistering temperatures.