LOS ANGELES (AP) — Winds picked up on Tuesday in Southern California and at least a couple of new wildfires broke out as firefighters remained on alert in extreme fire weather two weeks after two major blazes started that are still burning in the Los Angeles area.

Gusts could peak at 70 mph (113 kph) along the coast and 100 mph (160 kph) in the mountains and foothills during extreme fire weather that is expected to last through Tuesday morning. Wind speeds ranged from 35 mph ( 56 kph ) along the coast to 63 mph (101 kph) in the mountains overnight, according to National Weather Service reports.

The weather service issued a warning of a “ particularly dangerous situation ” for parts of Los Angeles, Ventura and San Diego counties from Monday afternoon through Tuesday morning due to low humidity and damaging Santa Ana winds.

“The conditions are ripe for explosive fire growth should a fire start,” said Andrew Rorke, a meteorologist with the weather service in Oxnard.

At least two small fires started in San Diego County. Evacuation orders were issued for the Lilac Fire, which had burned about 50 acres (20 hectares). It was growing “with a moderate rate of spread and structures are threatened,” the California Department of Forestry and Fire Protection posted. Firefighters made progress on the Pala Fire and it was reported as stopped, the agency said.

On Monday, Los Angeles fire crews quickly put out a small brush fire that broke out south of the iconic triple-domed Griffith Observatory. A man suspected of starting the fire was taken into custody, said David Cuellar, a Los Angeles Police Department spokesman. Firefighters also quickly extinguished a brush fire along Interstate 405 in the Los Angeles neighborhood of Granada Hills that temporarily closed the northbound lanes.

Fire crews aggressively fought a blaze that also sparked Monday afternoon in the city of Poway, in San Diego County, and stopped its forward progress.

Former Vice President Kamala Harris, and her husband Doug Emhoff, flew to Los Angeles after attending President Donald Trump’s inauguration and met with firefighters, volunteers and victims of the Eaton Fire in Altadena.

“We just came out to thank (firefighters), to thank the community and just remind folks that we’re all in this together,” Harris said. She said their home in Pacific Palisades was still standing.

Trump, who criticized the response to the wildfires during his inaugural address, has said he will travel to Los Angeles on Friday.

Gov. Gavin Newsom on Monday said the devastation left by the blazes underscores the need for partnership between the state and federal governments.

“I look forward to President Trump’s visit to Los Angeles and his mobilization of the full weight of the federal government to help our fellow Americans recover and rebuild,” Newsom said in a statement.

A small amount of rain is forecast for the weekend in the Los Angeles area, though more gusty winds are expected to return Thursday, Rorke said.

Authorities urged people not to mow their lawns to prevent sparking a fire, nor start any fires that could get out of control. They also urged residents to review their evacuation plans and ready emergency kits and be on the lookout for any new blazes and report them quickly.

David Acuna, a spokesman with the California Department of Forestry and Fire Protection, said the biggest concerns are the Palisades and Eaton Fires breaking their containment lines and a new blaze starting.

“Don’t do things to start another fire so we can focus on the mitigation of the current fires,” Acuna said.

The low humidity, bone-dry vegetation and strong Santa Ana winds come as firefighters continue to battle two major blazes in the Los Angeles area, the Palisades and Eaton fires, which have killed at least 27 people and destroyed more than 14,000 structures since they broke out during fierce winds on Jan. 7. The Palisades fire was 61% contained early Tuesday and the Eaton fire 87% contained, according to fire officials.

More evacuation orders were lifted Monday for Pacific Palisades and authorities said only residents would be allowed to get back in after showing proof of residency at a checkpoint. Over the weekend, two men impersonating firefighters attempted to enter an evacuation zone for the Palisades Fire, according to the Los Angeles County sheriff’s department.

Los Angeles Mayor Karen Bass said Monday the city was prepared for any possible new fires and warned the strong winds could disperse ash from existing fire zones across Southern California. She urged Angelenos to visit lacity.gov to learn about ways to protect themselves from toxic air during Santa Ana winds.

Cal Fire and local fire departments have positioned fire engines, water-dropping aircraft and hand crews across the region to enable a quick response should a new fire break out, Acuna said.

Acuna said Cal Fire had extra fire crews in Kern and Riverside counties.

Los Angeles fire officials said the department has all available engines ready and that 30 of them had been positioned in fire risk areas. The agency also ordered the outgoing shift of about 1,000 firefighters to remain on duty to staff the extra engines.

“The pre-deployment is very, very thoughtful and strategic,” Crowley said.