Anne Heche was in a coma Monday as authorities tried to piece together the chain of events days earlier that ended with the actress speeding down a Westside street, crashing into a house and suffering burns in the fire caused by the impact.

Los Angeles police are investigating Heche in connection with driving under the influence and hit-and-run after she crashed her car into a Mar Vista house Friday, igniting a fire. Heche, 53, was pulled by L.A. firefighters from the wreckage of her burned Mini Cooper.

As that investigation continued, news about Heche’s condition took a turn for the worse.

“Shortly after the accident, Anne Heche became unconscious, slipping into a coma and is in critical condition. She has a significant pulmonary injury requiring mechanical ventilation and burns that require surgical intervention,” a spokeswoman for Heche said in a statement to The Times.

Los Angeles Police Officer Annie Hernandez confirmed that detectives investigating the crash in the 1700 block of South Walgrove Avenue obtained a search warrant for the actor’s blood at the hospital to see whether she was under the influence.

Fifty-nine firefighters responded to the scene of the accident. In the moments before impact, Heche was captured on video crashing into a garage at an apartment building, then narrowly missing a pedestrian before striking a Jaguar, according to law enforcement sources and video that was made public.

David Manpearl was sitting at his desk Friday morning at his Mar Vista home when he saw a car speeding by his window.

Seconds later, he heard a loud thud.

“It took me one or two seconds to put together that the sound I heard was a crash,” he said. “I ran out the door and down the street to find out where the crash was and see if anyone needed help.”

When he arrived at the scene, he said, he found the front wall of a house missing and debris everywhere. He said Heche’s car had gone all the way through the house and was lodged in a wall in the back. He said he went inside the house and found its tenant standing in the middle of what was left of her kitchen, barefoot, asking for help with her tortoise and two dogs.

“She couldn’t move because the ceiling had come down, so there was all kinds of debris everywhere,” Manpearl said. He and another neighbor helped the neighbor to safety.

When David Manpearl arrived at the crash site, he found saw debris everywhere, a tenant asking for help and Anne Heche stuck in a car.

Trevor Colbert, who lives across the street, also ran outside after he heard the crash and saw a hole in his neighbor’s house. He said he went back inside, grabbed a fire extinguisher and returned to find his neighbor on her front lawn.

“She came out carrying one of her pets, and she seemed pretty rattled,” Colbert said. “She wasn’t really saying much. I think she was in shock.”

After making sure the tenant was safe, Manpearl said, he went back into the house to try to help Heche, who was still stuck in the car.

“It got to a point where there was fire everywhere. It was all around us,” he said. “It had spread from the car to the house and the smoke was getting thick. I kept hoping that the fire department was there, but it hadn’t come yet, and eventually I had to leave the house for my own safety.”

Heche has not been arrested or charged.

Heather Duffy Boylston, Heche’s friend and podcast partner, said in a statement: “Her family and friends ask for your thoughts and prayers and to respect her privacy during this difficult time.”

Shortly before the crash, Heche was acting like “a sweet little girl” as she bought a bright red wig at Glass Hair Design in Venice, salon owner Richard Glass said Monday.

A half-hour before crashing into a Mar Vista home, Anne Heche stopped by a Venice hair salon to buy a bright red wig — because the blue one was taken.

The actor was “very pleasant” and seemed to be fine Friday, Glass said, when she popped into his Main Street salon through the back door wearing a strappy top, comfy pants and fluffy, plush house shoes.

He posted a selfie showing the two of them — and the wig — on his Instagram account.

“So I met @anneheche today and she purchased a #redwig so random,” Glass captioned the photo for his 3,000 followers. “I love #venicebeach #actress #director #mom #celebrity #lifestyle.”

“In one of the images TMZ posted, you can see the wig on the console,” Glass said. And indeed, the photo that many believe allegedly shows a bottle of alcohol in the car’s cup holder also shows a bit of red fringe where the wig sits on the passenger side of the center console.

Heche is best known for her work as Vicky Hudson and Marley Love in the soap opera “Another World”; she won a Daytime Emmy Award in 1991 for her work on the show. In the 1990s, her credits included the films “Donnie Brasco,” “Six Days Seven Nights” and “Return to Paradise.” More recently, she appeared in the TV series “All Rise” and “Chicago P.D.” and the movie “The Brave.”

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Richard Winton is an investigative crime writer for the Los Angeles Times and part of the team that won the Pulitzer Prize for public service in 2011. Known as @lacrimes on Twitter, during almost 30 years at The Times he also has been part of the breaking news staff that won Pulitzers in 1998, 2004 and 2016.

Nicole Kagan is a 2022 summer intern for the Los Angeles Times. She is a New York City native and rising junior at Duke University, where she studies visual media and policy journalism. She’s previously written for the 9th Street Journal and Indy Week.

Christie D’Zurilla covers breaking entertainment news. A USC graduate, she joined the Los Angeles Times in 2003 and has 30 years of journalism experience in Southern California.

Christian Martinez is a Metro reporter covering breaking news at the Los Angeles Times. He previously wrote for the USA Today network of newspapers including the Ventura County Star, where he covered the Thomas and Woolsey wildfires and the Borderline mass shooting, the Spectrum & Daily News in Utah and the Lansing State Journal in Michigan. He was born and raised in Southern California and attended Saint Mary’s College of California.