Hurricane force winds of 120 km/h were possible from early Tuesday, with strong gusts expected through Wednesday, said David Roth, a meteorologist with the National Weather Service's Weather Prediction Centre.
A red flag warning was in effect as dry, dangerous Santa Ana winds picked up speed.
More than 8,500 firefighters attacked the fires from the air and on the ground, preventing conflagrations at either end of Los Angeles from spreading overnight.
"This setup is about as bad as it gets," Los Angeles City Fire Chief Kristin Crowley told local residents. "We are not in the clear."
State authorities were pre-positioning firefighting crews in Los Angeles and other Southern California counties that were under elevated fire danger, officials said.
Highlighting the risks, a small but fast-moving new fire erupted in scrubland in the bed of the Santa Clara River in Ventura County, northwest of Los Angeles.
Ground crew and several helicopters were working to contain the so-called Auto Fire, which had razed over 56 acres and was burning near a golf course but not yet threatening homes.
The two biggest wildfires, the Palisades and Eaton, erupted last week, fuelled by intense winds.
At least 24 people have died in the blazes since then, according to the Los Angeles County Medical Examiner.
The wildfires have destroyed or damaged more than 12,000 structures, turning entire neighbourhoods into smoldering ash and piles of rubble and leaving an apocalyptic landscape.
As of Monday, more than 92,000 people in Los Angeles County were under evacuation orders - down from more than 150,000 - while a further 89,000 faced evacuation warnings.
The Palisades Fire, which wiped out upscale communities on the western flank of Los Angeles, burned 96 square km and was 14 per cent contained.
The Eaton Fire in the foothills of the San Gabriel Mountains east of the city consumed another 57 sq km and was 33 per cent contained, the California Department of Forestry and Fire Protection reported.
A third fire, the Hurst, spanning 3.2 sq km was 95 per cent contained, while three other fires in the county have been fully brought under control in recent days.
Deputies were finding human remains every day in burned-out parts of Altadena, Los Angeles County Sheriff Robert Luna said.
"It is a very grim task," Luna said, adding he expected the confirmed death toll to rise in the days ahead.
California Governor Gavin Newsom has said the firestorm could rank as the most devastating natural disaster in US history.
It is already the costliest wildfire in terms of insured losses.
Los Angeles County District Attorney Nathan Hochman on Monday said 10 people had been arrested in connection with the fires. Nine were arrested for residential burglaries of fire-stricken areas. One other person was arrested for arson, after allegedly attempting to set a tree on fire in the city of Azusa, about 32 km northeast of downtown Los Angeles.
US Senator Adam Schiff, a Democrat from California, said on Monday there was "a special place in hell" and in jail for looters.
"Our hearts ache for the 24 innocent souls we have lost in the wildfires across Los Angeles," said US President Joe Biden, who announced additional disaster aid for California.
But top Republicans in the US Congress are considering imposing conditions on disaster aid, accusing the state's Democratic leadership of mismanaging water resources and forests.
California Governor Newsom and other top Democrats in the state have come under withering criticism for their handling of the fires.
President-elect Donald Trump planned to visit the disaster zone after he is inaugurated next week, a source familiar with the matter said.
With thousands of homeowners facing costly rebuilding, large commercial banks, including JPMorgan Chase and Bank of America, have announced plans to ease mortgage repayment conditions for those affected. Insurers are looking at historic losses.
