Southern California is under a red flag warning for critical fire risk. The area has been facing constant challenges in controlling the fires, as dangerous winds gained strength again yesterday.

The Hughes Fire broke out late on Wednesday morning and in less than a day charred nearly 41 square kilometres of trees and brush near Castaic Lake, a popular recreation area about 64 kilometres from the devastating Eaton and Palisades fires that are burning for a third week.

Crews made significant progress by late afternoon on the Hughes Fire, with more than one-third of it contained.

Two new blazes were reported on Thursday in the San Diego area.

Evacuations were ordered but were later lifted after a brush fire erupted in the late afternoon in the wealthy enclave of La Jolla near the University of California, San Diego, School of Medicine.

Further south, near the US-Mexico border, another blaze was quickly spreading through the Otay Mountain Wilderness, home to the endangered Quino checkerspot butterfly and other unique species.

In Ventura County, a new fire briefly prompted the evacuation of California State University Channel Islands in Camarillo. Water-dropping helicopters made quick progress against the Laguna Fire that erupted in hills above the campus of about 7000 students. The evacuation order was later downgraded to a warning.

Rain is forecast for the weekend, potentially ending Southern California’s months-long dry spell.

Winds are also not as strong as they were when the Palisades and Eaton fires broke out, allowing for firefighting aircraft to dump tens of thousands of gallons of fire retardant.

That helped the fight against the Hughes Fire in the Castaic area north of Los Angeles, allowing helicopters to drop water, which kept it from growing, fire spokesperson Jeremy Ruiz said.

“We had helicopters dropping water until around 3am. That kept it in check,” he said.

Nearly 54,000 residents in the Castaic area were still under evacuation warnings Thursday, the Los Angeles County Sheriff’s Department said.

There were no reports of homes or other structures burned.

Kayla Amara drove to Castaic’s Stonegate neighbourhood on Wednesday to collect items from the home of a friend who had rushed to pick up her daughter at preschool.

As Amara was packing the car, she learned the fire had exploded in size and decided to hose down the property.

Amara, a nurse who lives in nearby Valencia, said she’s been on edge for weeks as major blazes devastated Southern California.

“It’s been stressful with those other fires, but now that this one is close to home it’s just super stressful,” she said.

The Palisades Fire was more than three-quarters contained, and the Eaton Fire was 95 per cent under control on Thursday.

The two fires have killed at least 28 people and destroyed more than 14,000 structures since they broke out on January 7.

Rain was expected to start on Saturday, according to the National Weather Service.

Officials welcomed the wet weather, but crews also were shoring up hillsides and installing barriers to prevent debris flows as residents returned to the charred Pacific Palisades and Altadena areas.

The California fires have overall caused at least $US28 billion ($44 billion) in insured damage and probably a little more in uninsured damage, according to Karen Clark and Company, a disaster modelling firm known for accurate post-catastrophe damage assessments.

On the heels of that assessment, California Republicans are pushing back against suggestions by President Donald Trump, House Speaker Mike Johnson, and others that federal disaster aid for victims of wildfires should come with strings attached.

The state Legislature approved a more than $US2.5 billion fire relief package on Thursday, in part to help the Los Angeles area recover from the fires.

Trump plans to travel to the state to see the damage firsthand on Friday, but it isn’t clear whether he and Democratic Governor Gavin Newsom will meet during the visit.