The Brief

What’s shaping up to be one of the worst wildfire disasters in U.S. history had many causes. Before the blazes raged across Los Angeles last week, eight months with hardly any rain had left the brush-covered landscape bone-dry. Santa Ana winds blew through the mountains, their gusts turning small fires into infernos and sending embers flying miles ahead. As many as 12,000 buildings have burned down, tens of thousands of people have fled their homes, and at least two dozen people have died.

Yet key questions about the fires remain unanswered: What sparked the flames in the first place? And could they have been prevented? Some theorize that the Eaton Fire in Pasadena was caused by wind-felled power lines, or that the Palisades Fire was seeded by the embers of a smaller fire the week before. But the list of possible culprits is long — even a car engine idling over dry grass can ignite a fire.

“To jump to any conclusions right now is speculation,” said Ginger Colbrun, a spokesperson for the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives, the lead agency investigating the cause of the Palisades Fire, to the Los Angeles Times. Figuring it out will likely take months. It took the bureau more than a year to conclude that the fire in August 2023 that devastated Maui, which was similarly lashed by high winds, was started by broken power lines.

Even given enough time, the causes of the Los Angeles fires might remain a mystery. According to a recent study, authorities never find the source of ignition for more than half of all of wildfires in the Western U.S. — a knowledge gap that can hamper prevention efforts even as climate change ramps up the frequency of these deadly events.

“Fire research is so incredibly difficult. It’s more difficult than looking for a needle in the haystack,” said Costas Synolakis, a professor at the University of Southern California who studies natural disasters.

Synolakis said fires with especially high temperatures, such as those in Los Angeles, often obliterate the evidence. “That’s why it’s so challenging to mitigate fire losses,” he said. “You just don’t know what triggers them.”

The U.S. Forest Service is teaming up with computer scientists to see if artificial intelligence can help crack old cases. A study led by data scientists at Boise State University, published in the journal Earth’s Future earlier this month, analyzed the conditions surrounding more than 150,000 unsolved wildfire cases from 1992 to 2020 in Western states and found that 80% of wildfires were likely caused by people (whether accidentally or intentionally), with lightning responsible for just 20%. According to Cal Fire, people have caused 95% of California’s wildfires.

Karen Short, a research ecologist with the U.S. Forest Service who contributed to the study and maintains a historical database of national wildfire reports, says understanding why they start is essential for preventing them and educating the public. Strategic prevention appears to work: According to the National Fire Protection Association, house fires in the U.S. have decreased by nearly half since the 1980s.

In 2024, Short expanded her wildfire archive to include more information useful to investigators, such as weather, elevation, population density and a fire’s timing. “We need to have those things captured in the data to track them over time. We still track things from the 1900s,” she said.

According to Short, wildfire trends across the Western United States have shifted with human activity. In recent decades, ignitions from power lines, fireworks, and firearms have become more common, in contrast with the railroad- and sawmill-caused fires that were once more common.

Signage warns against the use of illegal fireworks in Pasadena in June 2022.

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The study found that vehicles and equipment are likely the main culprit, potentially causing 21% of wildfires without a known cause since 1992. Last fall, the Airport Fire in California was just such an event, burning over 23,000 acres. And an increasing number of fires are the result of arson and accidental ignition — whether from smoking, gunfire or campfires — making up another 18%. In 2017, an Arizona couple’s choice of a blue smoke-spewing firework for a baby gender reveal party lit the Sawmill Fire, torching close to 47,000 acres.

But these results aren’t definitive. Machine learning models such as those used for the study are trained to predict the likelihood of a given fire’s cause, rather than prove that a particular ignition happened. Although the study’s model showed 90% accuracy selecting between lightning or human activity as the ignition source when tested on fires with known causes, it had more difficulty determining exactly which of 11 possible human behaviors were to blame, only getting it right half the time.

Yavar Pourmohamad, a data science Ph.D. researcher at Boise State who led the study, said that knowing the probable causes of a fire could help authorities warn people in high-risk areas before a blaze actually starts.

“It could give people a hint of what is most important to be careful of,” he said. “Maybe in the future, AI can become a trustworthy tool for real-world action.”

Synolakis, the USC professor, says Pourmohamad and Short’s research is important for understanding how risks are changing. He advocates for proactive actions like burying power lines where they can’t be buffeted by winds.

A 2018 study found that fires set off by downed power lines — such as the Camp Fire in Paradise, California, that same year — have been increasing. Although the authors note that although power lines do not account for many fires, they’re associated with larger swaths of burned land.

“We have to really make sure that our communities are more resilient to climate change,” Synolakis said. “As we’re seeing with the extreme conditions in Los Angeles, fire suppression alone doesn’t do it.”

Early every Saturday for the last three and a half years, William Campbell, 61, leaves his Silver Lake home to be at the Angels Flight station for the first ride at 6:45 a.m.

Campbell is one of a team of operators behind the proverbial wheel of the two near-identical funiculars — named Olivet and Sinai — that go up and down a 33% angle slope from Hill Street to Bunker Hill in downtown Los Angeles.

“You’re a part of living history,” said Campbell, who is dressed in an orange and black waistcoat and bow tie, and wears a bowler hat with a monarch butterfly on top. There’s a reason for that, he said mysteriously.

Angels Flight on Bunker Hill.

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Today, I am the first rider. Soon after, I am joined by a family visiting from Texas.

“I was just looking at a local tourist place, and I just saw this small, cute railway,” said Michael Nguyen, who was alongside his mother and sister. “I was like, oh, this looks interesting. And I saw that you can actually go on it. I was like, OK, that’s pretty dope.”

Masterminded by lawyer, politician and engineer Col. James Ward Eddy, the Angels Flight “hillevator” opened on New Year’s Eve 1901 as a way for people to travel up and down Bunker Hill, which was then the place where the city’s wealthy population lived.

The journey took them down to the streets and stores below and from 1917, Grand Central Market, with the first passengers paying just a penny fare for what was billed as the “shortest railway in America,” traveling just 298 feet.

When he’s not working his weekday full-time day job investigating animal cruelty and abuse, Campbell spends his spare time looking through online newspaper archives for any information about Angels Flight.

Angels Flight Railway.

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James Bartlett

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Angels Flight Railway.

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James Bartlett

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Originally located by the 3rd Street Tunnel — at the end of the block from where it is now — the train has been through several changes, as has Bunker Hill itself.

“All the wealthy people moved to Beverly Hills, and Brentwood, and Bel Air, and beyond. And all their wonderful Victorian mansions were turned into boarding houses, and it attracted a lower income, more diverse population, which resulted in blight and crime — at least according to the city,” Campbell said of Bunker Hill's transformation.

City officials authorized Bunker Hill to be all but razed in the 1950s and '60s, and Angels Flight was put into what was promised to be temporary storage for a year or two, despite protests from singer Peggy Lee and others.

The year was 1969. And it took nearly three decades for its return. Angels Flight welcomed passengers again in 1996 to its current location after test runs were made with cases of beer and soft drinks weighing 9,000 pounds. The cable cars were rebuilt exactly as before, but with modern safety requirements, such as Sinai having wheelchair space.

A 2001 accident in which one person died and seven were injured saw another long closure until 2010, and there was a derailment in 2014, which saw another short shuttering. But Angels Flight has been running ever since 2017, save the odd mechanical problem.

William Campbell.

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James Bartlett

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LAist

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Angels Flight keepsakes made by William Campbell for riders to take.

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James Bartlett

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LAist

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Campbell describes himself as a cheerleader for Angels Flight, and you can easily see why. During his shift he pins up a 1904 photo of the city’s landscape taken from an 80-foot-high observation tower at the original location, so people can compare it to the skyscraper skyline of today.

“At one time you could see all the way to Catalina,” he noted.

There is also a display about near-forgotten Bunker Hill folk artist Marcel Cavalla, and Campbell gives away Angels Flight bookmarks, stickers and maps, all of which he researches, designs and prints out of his own pocket.

One of his projects, old advertisements from 1901 to the 1940s, is displayed in the panels above the seats, and was installed a couple of months ago.

Interior of Angels Flight, showcasing old advertisements from 1901 to the 1940s that Campbell installed.

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James Bartlett

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One of the vintage ads for Catalina Carrier-Pigeon Service.

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There's everything from old Market Basket supermarket ads, to Barbara Stanwyck shilling for Lux toilet soap, to a standard power mower from John Bean manufacturing, to one for the Catalina Carrier Pigeon Service, which operated from 1894 to 1902, taking messages from Avalon to Bunker Hill.

And the monarch butterfly on his hat? That’s related to his Angels Flight “holy grail,” the one question he can’t definitively answer: why were they painted orange and black?

With that, Campbell grabs his binoculars and sees there are passengers waiting for a ride up, so I get into Olivet and wave goodbye as I travel down to Hill Street.

A group called Neighbors Helping Neighbors has been clearing overgrown weeds for free on fire survivors' empty lots in Altadena.

They’ve finished 10 with many more to go. They’re keeping at it not just to keep things tidy, but to avert another disaster as the region enters fire season — and their efforts are spreading. More than 200 homeowners have signed up, after hearing about the group from its Facebook page and through word of mouth.

“I'm 5 feet 2 inches tall, but there were weeds 6 and 8 feet tall,” said Antoinette “Toni” Bailey-Raines, the ringleader. She is also a co-founder of Altadena Talks Foundation, a nonprofit started in the wake of the Eaton Fire.

Bailey-Raines lives in San Dimas but grew up in Altadena. Her parents and sister all lost their homes in the Eaton Fire.

“I went to my parents' lot one day,” she said. “I loaded up the back of my car with my lawnmower, my blower, my rake, because I wanted to make sure their lot was cleaned up.”

It took seven hours, but she figured all that overgrown vegetation can't be good for Altadena with the fire season just around the corner.

And just like that, the idea for Neighbors Helping Neighbors was born.

Preventing another disaster

Antoinette “Toni” Bailey-Raines, founder of Neighbors Helping Neighbors.

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Fiona Ng

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Antoinette “Toni” Bailey-Raines at one of the cleared lots.

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The very first lot, just south in Pasadena, was cleared in mid-April. Bailey-Raines said the property was getting notices from the city to clear the lot or face escalating fines. Pasadena conducts brush clearance inspections every spring and summer.

Toni said the family had moved to Mississippi after the Eaton Fire.

“You lost everything, and then somebody's gonna tell you they're gonna give you a fine because you have weeds on your lot and you're not even here to see that?” Bailey-Raines said.

That day, she rounded up a group of nine people, including her son and his friend. A neighbor across the street was suspicious at first, but eventually told her, "You have me for about an hour." He stayed for two.

The job took less than four hours.

A growing movement

On May 13, dozens of volunteers showed up in Altadena to clear seven lots in one morning.

One of them — a 14,000-square-foot lot — belongs to Sarkis Aleksanian and his family. He had reached out to Bailey-Raines in late April, after learning about the group from a neighborhood WhatsApp chat.

“I was looking into cleaning up the lot and really daunted by the prospect,” he said. “I was worried that the lawn would dry up and be a problem.”

Aleksanian and his wife were on hand to help out. It’s the one thing that Bailey-Raines requires — for the homeowners to be there.

“I've asked them that if they're able-bodied to be here and help,” she said. “You're here. You're encouraging people, and you're helping on your lot. [Sarkis] was doing everything from weed-eater, to chainsaw, to whatever, and that's what it's about.”

This 14,000-square-foot lot in Altadena was cleaned up in less than two hours on a recently Saturday.

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“It was just remarkable, I tell you,” Aleksanian said. He said he recognized some of the volunteers that morning — folks he sees in the community.

And he did encounter someone he knew — a high school acquaintance from years back. “It's neighbors helping neighbors, just like she called it, you know?” Aleksanian said.

His lot was finished in 90 minutes.

More is needed

With a growing waitlist, what is needed are people and equipment — from gloves and trash bags to the hardware.

“I have six brush cutters and two chainsaws and a couple trimmers, but I need, like, triple that at least,” she said.

Same goes for rechargeable batteries that power these tools — which Bailey-Raines juices up with generators they bring on-site.

A number of organizations — including Neighborhood Survants, Altagether, Project Passion, My Tribe Rise, Dena Heals — have granted money and donated equipment and manpower. Bailey-Raines has also put in her own money.

“My dream is one Saturday morning to have 500 people and that we clear a whole street, a whole block — so that this list of 200 can go down, and as others hear about it, they get on it, and we as a community do this as neighbors to help one another,” she said.

After fires and floods, Southern California’s only remaining native freshwater turtle recently got a boost.

Just last month, 15 southwestern pond turtle hatchlings were released into the San Gabriel River — a major milestone in an effort to restore the vulnerable turtle population.

But this wasn’t a typical raise-and-release scenario.

These turtles’ parents went on a harrowing journey before they were born.

A daring rescue

In early September 2020, amid a heat wave and dry weather, a tree branch hit a Southern California Edison power line, igniting the Bobcat Fire.

The fire eventually scorched more than 180 square miles — mostly forest in the San Gabriel Mountains. For comparison, the 2025 Eaton Fire burned about 22 square miles.

Lights from a fire truck illuminate firefighters working the Bobcat Fire in September 2021.

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As the Bobcat Fire spread, biologists grew worried. The fire was burning in the West Fork of the San Gabriel River, a biodiversity hotspot and refuge for bears and mountain lions, the federally protected Santa Ana sucker fish and the mountain yellow-legged frog.

It’s also home to the largest remaining — and possibly only — population of southwestern pond turtles in the entire watershed. Their exact numbers aren’t known, but it’s likely less than 200.

“Because this hadn’t burned in decades and decades and decades, there was big concern about debris flows,” said Robert Fisher, a biologist with the U.S. Geological Survey.

Scientists hoped the turtles would be able to ride out the fire itself by staying in the water, but any rain after would likely lead to a deluge of mud, trees and other burned materials. That would be akin to an avalanche for the turtles in the river, and it had the potential to wipe out the entire population.

Once the flames died down, Fisher and a team of biologists, in partnership with the California Department of Fish and Wildlife and U.S. Forest Service, trekked to the home of the pond turtles.

“It was a moonscape,” Fisher said.

They waded through ashy, murky waters, eventually collecting 11 adult turtles.

A temporary home and 15 surprises

The turtles were taken to the San Diego Zoo, where the plan was to hold them until their mountain habitat recovered enough for them to return.

By 2024, the San Gabriel Mountains were looking far better — biologists even found some pond turtles that survived major debris flows.

But right before the turtles were set to go back home, scientists got a surprise.

“Just before we were getting to release, we found a baby turtle, which is amazing,” said Brandon Scott, wildlife care manager of herpetology and ichthyology at San Diego Zoo Wildlife Alliance. “You don't know how long it's going to take to restart that process of them actually being able to breed, with the stress and it's a new habitat.”

A juvenile southwestern pond turtle is weighed before being released to the wild.

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The turtles and the new baby were all returned to their home in the San Gabriels. But then came another surprise. And another.

“We just continually, every day, started finding a baby in that habitat,” said Scott.

Female southwestern pond turtles lay and bury their eggs in late spring or early summer. Juveniles emerge months later, only about the size of a quarter.

Fifteen babies later, conservation staff were shocked and pleased.

Their goal for the 11 rescued turtles was to make sure they could thrive before being released back into their habitat. “But in the process,” Scott said, “yes, we made it comfortable enough for them to breed.”

A hopeful release

The new generation of southwestern pond turtles was released in April near the spot their parents were rescued from in the San Gabriel River.

Such rescues of vulnerable wildlife are becoming increasingly common in the face of more catastrophic fires. All but two of the biggest fires in recorded history have been in the last 20 years.

Fisher said a similar rescue of pond turtles had occurred only once before, after the 2009 Station Fire in the San Gabriels. That time, the turtles were quickly returned to their habitat.

A staff member of the San Diego Zoo Wildlife Alliance releases a juvenile southwestern pond turtle into the San Gabriel River.

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That rescue, in part, inspired the U.S. Geological Survey to work with the San Diego Zoo to build a conservation habitat for southwestern pond turtles nearly two decades ago. And the Bobcat Fire became the first time it was used for wild rescues, Fisher said.

Ironically, the Bobcat Fire could eventually help the local population, Fisher said.

“We’ve known about [the population] for decades, but it’s not really thriving,” he said. “So this helped give it a head start. And because the fire was so intense, it opened up a lot of habitat.”

With less tree canopy and more sunlight, the cold-blooded reptiles could thrive in warmer waters and on sunnier rocks.

But the new generation is key.

“Because the site was so forested and hadn’t burned in so long, we don’t think they were having good success at breeding,” Fisher said. “Now we think we’ve really enhanced the population by putting more animals out there, especially young animals.”

Scott and Fisher said the saga has inspired preliminary conversations about formalizing breeding efforts to support the population. The little turtles' myriad threats have yet to let up, so they’ll likely need more help in the future.

But at the moment, there’s a little more hope — at least 16 hatchlings and 11 adults' worth of hope, to be exact — for California’s only native freshwater turtle.