LOS ANGELES — Firefighters scrambled Sunday to make further progress against wildfires that have destroyed thousands of homes and killed 24 people in the Los Angeles area as forecasters again warned of dangerous weather with the return of strong winds this week. At least 16 people were missing, and authorities said that number was expected to rise.

The National Weather Service issued red flag warnings for severe fire conditions through Wednesday, with sustained winds of 50 mph (80 kph) and gusts in the mountains reaching 70 mph (113 kph). The most dangerous day will be Tuesday, said weather service meteorologist Rich Thompson.

“You’re going to have really strong gusty Santa Ana winds, a very dry atmosphere and still very dry brush, so we still have some very critical fire weather conditions out there,” Thompson said at a community meeting Saturday night.

Los Angeles County Fire Chief Anthony C. Marrone said 70 additional water trucks arrived to help firefighters fend off flames spread by renewed gusts. “We are prepared for the upcoming wind event,” Marrone said. Fire retardant dropped by aircraft Sunday will act as a barrier along hillsides, officials said.

Fierce Santa Anas have been largely blamed for turning the wildfires sparked last week into infernos that leveled entire neighborhoods around the city where there has been no significant rainfall in more than eight months.

Twelve people were missing within the Eaton Fire zone and four were missing from the Palisades Fire, Los Angeles County Sheriff Robert Luna said. Luna added that “dozens” more reports might have come in Sunday morning and investigators were reconciling whether some of the missing might be among the dead. There are no children among those reported missing, he said.

Meanwhile, the death toll rose to 24 over the weekend. Eight of the deaths were attributed to the Palisades Fire and 16 resulted from the Eaton Fire, the Los Angeles County coroner’s office said in a statement Sunday evening.

Officials said they expected that figure to increase as teams with cadaver dogs conduct systematic grid searches in leveled neighborhoods. Authorities have established a center where people can report the missing.

Officials also were building an online database to allow evacuated residents to see if their homes were damaged or destroyed. In the meantime, LA city Fire Chief Kristin Crowley urged people to stay away from scorched neighborhoods.

“There are still active fires that are burning within the Palisades area, making it extremely, extremely dangerous for the public,” Crowley said at a Sunday morning briefing. “There’s no power, there’s no water, there’s broken gas lines, and we have unstable structures.”

Officials warned the ash can contain lead, arsenic, asbestos and other harmful materials.

About 150,000 people in Los Angeles County remained under evacuation orders, with more than 700 residents taking refuge in nine shelters, Luna said. Officials said most of the orders in the Palisades area were unlikely to be lifted before the red flag warnings expire Wednesday evening.

“Please rest assured that first thing Thursday we will begin talking about repopulation,” Marrone said. What appeared to be small fire tornadoes were spotted Friday night as the Palisades Fire blazed through California’s San Fernando Valley.

By Sunday morning, Cal Fire reported the Palisades, Eaton, Kenneth and Hurst fires had consumed more than 62 square miles (160 square kilometers), an area larger than San Francisco. The Palisades Fire was 11% contained and containment on the Eaton Fire reached 27%. Those two blazes accounted for 59 square miles (nearly 153 square kilometers).

Crews from California and nine other states are part of the ongoing response that includes nearly 1,400 fire engines, 84 aircraft and more than 14,000 personnel, including newly arrived firefighters from Mexico.

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