SCU Complex, the largest wildfire burning in California, will hopefully be fully contained later this week, authorities in the US state said.
On Monday, the California Department of Forestry and Fire Protection (Cal Fire) anticipated that the 1,550 square kilometre blaze will be fully contained by Thursday, reports Xinhua news agency.
Officials on Monday morning reported its containment grew 10 points overnight to 60 per cent.
More than 20,000 buildings remained threatened by the fire.
Meanwhile, the second CZU complex blaze grew 100 acres overnight to 84,860 acres, according to Cal Fire.
Containment was at 39 per cent.
More than 860 homes have been destroyed by the fire, which has burned for more than two weeks in San Mateo and Santa Cruz counties.
The size of the third LNU Complex blaze was steady as containment grew.
The massive LNU blaze remained at 375,209 acres on Monday morning, but containment grew five points overnight to 63 per cent, Cal Fire said in an update.
The blaze has destroyed over 1,200 buildings, while more than 5,000 structures remained threatened.
Another smoky week is expected in the San Francisco Bay Area, with unhealthy air quality in North Bay areas, according to a report by San Francisco Chronicle.