The Brief

Hexavalent chromium nanoparticles were found in air samples gathered by researchers over the course of several days in the spring as they drove through and around the Eaton and Palisades fire burn areas.

The heavy metal — also known as chromium-6 and brought to public consciousness by environmentalist Erin Brockovich in the 1990s — is a known carcinogen. But researchers aren’t yet sure what the public health implications are.

“ We think that there's hotspots in the cities, but we don't have a way to quantify that yet with what we've measured so far,” said Michael Kleeman, professor of civil and environmental engineering at UC Davis.

Kleeman was the lead author of a paper that’s been submitted to the journal Nature’s Communications Earth and Environment for peer review and published online as a preprint. The researchers are part of the L.A. Fire Health Study, a group of universities working together to investigate the health effects of the January fires.

The high temperatures produced by wildfires can transform chromium — which is both naturally occurring and found in consumer products — into chromium-6. It’s a known hazard. A 2023 study found chromium-6 present in soil 10 months after the Hennessy Fire in Northern California. The persistence was likely in part due to a lack of precipitation.

Kleeman said it’s unclear where the nanoparticles they detected may have come from.

Tires could be a source, as could solar panels, electronics, or even fire retardant, which LAist found contains chromium.

To gather the samples, the team drove through the Altadena and Palisades burn areas on eight separate occasions with air samplers mounted to their roof. The trips occurred while lots still were being cleared, raising the possibility that now, with that activity dying down, less dust may be kicked up and chromium-6 levels in the air will be lower.

They’ll be gathering additional samples from the burn areas next week.

Health effects

The levels of chromium-6 detected were below Occupational Health and Safety Administration workplace limits but above the U.S. Environmental Protection Agency screening levels for workplace and home air, according to the study.

“It would be important to follow up with more recent measures to make sure that the problem is gone,” said Dr. Ana Navas-Acien, the chair of environmental health sciences at Columbia University’s Mailman School of Public Health who wasn’t involved in the research.

That’s because chronic exposure to hexavalent chromium can increase a person’s risk of lung cancer and nasal cancer, as well as lead to eye, kidney, and lung damage. Asthma and respiratory irritation are the primary concern with short-term, low-level exposure.

When inhaled, the tiny chromium-6 particles are absorbed rapidly and fully through the respiratory tract, entering the blood stream, penetrating cells, and traveling to major organs, including the liver and the brain.

Navas-Acien said it would be reassuring to know that levels of chromium-6 in the air have come down, as that would indicate this was a temporary phenomenon.

“But if you still detected it today, then I think that’s when we need to be more careful because there could be a real issue that’s more chronic,” she said. “Was it because of the fires, the cleaning? Was something going undetected?"

It will take a few weeks for Kleeman’s team to process the results of new tests.

Questions to be answered

Kleeman said the researchers’ work is not done. They hope additional study in the burn areas can answer some of the following questions:

• Have levels of hexavalent chromium returned to normal background levels? This will help determine if there’s an ongoing threat to public health.
• What's the source of the hexavalent chromium nanoparticles? Determining a source is critical to figuring out where the hotspots may be, who has been exposed, and to what degree their health may be compromised.
• Given all of the information gathered, should we change how we approach fighting and cleaning up after fires going forward? Can this problem be mitigated? If the problem is due to naturally occurring chromium in the soil, not much can be done. If it’s related to a product, then maybe that product can be removed from high fire areas.

How to stay safe and learn more

Both Kleeman and Navas-Acien recommended that you follow the same procedures you might for responding to lead contamination: run air purifiers, use a vacuum with HEPA filters, wipe down dusty areas with a wet cloth, all in an effort to prevent particles from becoming airborne in your home. It helps to leave your shoes at the door to keep dust out of the home and to wear a mask when you do cleanup work as well.

“The important message that we want to get across is: Get air filters in your house if you haven't done it yet,” said Jane Lawton Potelle with Eaton Fire Residents United, which has been working with L.A. Fire Health Study researchers.

Your HVAC system should have MERV-13 or higher HEPA filters; and standalone air purifiers should have HEPA and carbon filters, according to a Q&A on the L.A. Fire Health Study website.

In collaboration with Eaton Fire Residents United and Resilient Palisades, experts held an online Q&A at 6 p.m. Thursday. Public health specialists from UCLA, Harvard and other universities answered questions and explained their research. Find a summary and a video of the webinar on the PostFire website.

LAist senior editor Jared Bennett contributed to this report.

In describing the massive undertaking it was to compose the score for the latest Avatar installment, Avatar: Fire and Ash, film composer Simon Franglen has some statistics he likes to share.

One is that almost every minute of the three-hour, 17-minute film was scored — three hours and four minutes to be exact. Printed out, that amount of music totaled more than 1,900 pages and had to be transported in two large road cases.

Another favorite stat of Franglen’s is that the epic score, which needed to match the epic scale of the film, required the work of 210 musicians, singers and engineers in Los Angeles.

Bucking the trend of recording overseas

Franglen is from the U.K., but L.A. has been his home for years. Meaning no disrespect to Britain, Franglen still says, “I would rather be here than anywhere else.”

That pride in his adopted home base has extended to his scoring work for Avatar, which Franglen says he and the film’s producers (director James Cameron and Jon Landau, who passed away in 2024) wanted recorded in Los Angeles, despite the fact that a lot of film scoring is increasingly moving abroad.

Franglen scored the second Avatar film, Avatar: The Way of Water, as well, and worked with Cameron previously, along with his mentor, composer James Horner, on the first Avatar and Titanic.

He also has worked as a session musician and producer with artists like Whitney Houston, Barbara Streisand, Miley Cyrus and Celine Dion — he won a Grammy for Dion’s “My Heart Will Go On” from Titanic.

But even with his membership in the small club of Grammy winners, Franglen is more likely to bring up that he’s been a member of the American Federation of Musicians Local 47, the local professional musicians union, for more than three decades.

Recording the Avatar: Fire and Ash theme in Los Angeles was important to everyone on the production, Franglen says, as was bucking recent trends of scaling back film scores or using more electronic scoring than live orchestras.

“The Hollywood film score is something that we've all grown up with,” Franglen says. And it was important to him and the producers to keep the recording of the score in L.A. (the first and second Avatar scores were recorded here, as well) “because we are very much a part of not just the music community but the film community of L.A., which has been having a tough time recently, as we all know.”

“ I'm very proud of being able to keep the work here,” Franglen says. “And I think the quality of the work is shown in the score itself, which I'm exceedingly proud of.”

Avatar: Fire and Ash’s end-credits song, “Dream As One,” sung by Miley Cyrus and which Franglen co-wrote with Cyrus, Mark Ronson and Andrew Wyatt, recently was nominated for a Golden Globe. And the score for Avatar: The Way of Water earned Franglen a 2023 World Soundtrack Award.

How work for musicians in LA has declined and the ripple effects

When Franglen first came to L.A. as a session musician, he says there were seven full-time orchestras working every day. When he was working on pop records, Franglen says, the top guitarists would need to be booked three months in advance because they were so busy.

Today, Franglen says, there’s less and less work because of productions moving overseas.

The latest annual report from Film LA, the official film office for the LA region, found the number of scripted projects filmed in L.A. declined 14 percent from 2023 to 2024.

And while California expanded its Film & TV Tax Credit Program this year to help encourage productions to stay here, its effects aren’t yet known.

“The problem is [...] if you're going to film in Europe, then maybe you don't record the score in L.A.,” Franglen says. “ And eventually what happens is that if I want to hire the finest guitarist in the world, I know that he'll be available. I can probably ask him, ‘Would you be available this week or next?’ And he will say yes.”

While that can be wonderful in many ways, Franglen says, it also means less opportunities overall, including for musicians with less experience who might get a chance at a bigger gig if all the top musicians were as busy as they used to be.

“I'm seeing a lot of the faces that I know from when I was a session musician in my orchestra," Franglen says. "That's great. I'm very, very pleased to see them. But it also means that the turnover has not been as extensive as what one would've expected, and that turnover is important.”

More new players coming in, Franglen says, helps ensure that recording work for movies like Avatar — and smaller scale films too — can stay in Los Angeles for years to come.

This year, as South Gate librarian Stephanie Lien reviewed new picture books for the LA County Library’s shelves, she found a story that reflected her own childhood.

Little Bird Laila is the story of a young girl with a big job — translating between the English in her everyday life and the Chinese her parents speak.

“ I know every kid who may be like a first-generation immigrant who has parents who don't speak English that well — they've done the same thing,” Lien said. “I know I did it as a kid.”

In California, an estimated 1.8 million children are part of a family where at least one parent has difficulty speaking English. The experience of kids translating for their family members is called "language brokering.” It can feel burdensome but also build empathy.

“ You get annoyed,” Lien said. “But … [I realized] they need help, just like I do.”

And it turns out, this wasn’t the only SoCal-created picture book on the subject this year. Manhattan Beach author Maritere Rodriguez Bellas and local publisher Lil’ Libros created the bilingual Tío Ricky Doesn't Speak English. (Thanks to MiJa Books co-founder Stephanie Moran Reed for the heads up!)

"Little Bird Laila" and "Tío Ricky Doesn't Speak English"

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Erin Hauer and Ross Brenneman

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LAist

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LAist sat down with both authors to understand how they brought these stories to life and what they hope families find between the pages.

These excerpts are from separate interviews with Maritere Rodriguez Bellas and Kelly Yang.

Author Kelly Yang.

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Jessica Sample

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Author Maritere Rodriguez Bellas.

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Fletcher Wold Photography

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LAist: What compelled you to become an author?

Bellas:  Over three decades ago, when I was raising my kids, there was really very little information or education about bilingual parenting.

I grew up with Spanish and English, and then I went to school and I learned a third language, French. While doing that, I met people from all kinds of cultures, and I realized what a gift it was to be able to communicate in all these languages and learn about all these cultures.

Yang: I have been writing for many, many years — pretty much since I was a little kid — but wasn't really sure if I could do it as a profession. I would go to the library, and I would look at the back of books, and I didn't really see anyone who looked like me, so I didn't really know if this was a possibility for someone like me. I loved telling stories. I come from an immigrant background, and my parents and I moved here [from Tianjin, China] when I was 6 years old. Stories were really big in our family, as a way to keep ourselves motivated and paint a brighter future for our lives.

Where did the idea of your book come from? 

Yang: [Little Bird Laila]  mirrors my own childhood experience. To this day, I am the one dealing with pretty much all of the property tax filings — anything that has to do with English, even though my parents actually do speak English. But this is just kind of an inherited job that I'm unfortunately tenured for now.

 As a kid, it was very aggravating. I didn't want to have to do all these other things. When we grow up with parents who really need our help, we don't really have a choice.

I learned that there were things that were pretty powerful about it too. Everyone kind of depended on me. I also got to translate things in my own favor. So for example, when I would go to teacher-parent conferences — and obviously I had a lot of grammar mistakes and spelling mistakes when I was a kid — I would just tell my mom, ‘Kelly is doing an amazing job.’

I learned that there were, you know, two sides of the coin. Yes, there's a lot of work. It can be a big pain, but there were also benefits too.

Bellas:  In 2017, I was asked to write my first children's book.   I did not intend my career to end up as a children's book author, but I wrote that book, and while I was writing it, I kept thinking, ‘This is the book that my kids didn't have when they were growing up.’

I truly believe having raised multicultural kids, the more we expose children to different cultures and different languages, the better adults they're going to be in their future — compassionate, empathetic, respectful. And those are the virtues that I wanna ... show and I want parents to go after when they're raising their little pequeñitos.

Fast forward to 2022, when Bellas reached out to local bilingual book publisher Patty Rodriguez (Lil’ Libros) with a few ideas for children’s books. 

Bellas:  One of the ideas was a boy that had to translate for his grandmother, and she called me on the phone right away, and she’s like, ‘This spoke to me because that was me.’

The little boy in Tío Ricky Doesn't Speak English is Puerto Rican, and throughout the story, there are little hints at his identity. For example, he plays dominoes with his uncle and there’s a bag of plantain chips on the table. Why were those details important to include? 

Bellas:  I wanted my Puerto Rican culture to be highlighted. It's important to me. My kids didn't have that. They spent every summer for, I don't know, 12 years in a row in Ponce, Puerto Rico. So they grew up with the flavors and the smells and the noise and all that from our culture. But they didn't have it once we were back home. I couldn't read them a book where they could actually see themselves.

I also want to share with children from all cultures. I want them to learn about my little island wherever they are.

At one point in Little Bird Laila, the girl realizes she can teach her parents English, even though she hasn’t quite perfected the language herself. Why did you include this uncertainty? 

Yang: I just wanna be real to the authentic experience of someone who is still learning. And there is a lot of self-doubt, right? You're a learner, but you're still able to teach other people even though you are a learner. And I wanted to honor that — that people felt that they could, that they had permission, that they could do it. Because I definitely wasn't perfect at speaking or writing or reading or any of it, but ... there were things I could still give.

What do you hope families take away from your book? 

Yang: The central theme for all my books is to hope that people feel seen and that they find the humor and the heart in the story because there's a lot of funny moments and there's a lot of deeply emotional moments too. We really need to cherish those moments. Whatever we can do to spend time together as a family, right?

It's OK to open up and share that we don't have all the answers or we don't know all of the skills. There are tons of things I tell my kids like, I don't know. I don't know how to navigate that app. Right? Or whatever it is. There's lots of things I don't know, and it's OK to share that, and it's OK to be vulnerable together, and it's OK to learn together.

Bellas: The idea was always that the child, when he or she reads the book, would think, ‘Oh, it's really not a chore to translate. It's really an act of kindness and love and I'm proud to be bilingual.’

FBI deputy director Dan Bongino said Wednesday he plans to step down from the bureau in January.

In a statement posted on X, Bongino thanked President Trump, Attorney General Pam Bondi and FBI Director Kash Patel "for the opportunity to serve with purpose."

Bongino was an unusual pick for the No. 2 post at the FBI, a critical job overseeing the bureau's day-to-day affairs traditionally held by a career agent. Neither Bongino nor his boss, Patel, had any previous experience at the FBI.

Bongino did have previous law enforcement experience, as a police officer and later as a Secret Service agent, as well as a long history of vocal support for Trump.

Bongino made his name over the past decade as a pro-Trump, far-right podcaster who pushed conspiracy theories, including some involving the FBI. He had been critical of the bureau, embracing the narrative that it had been "weaponized" against conservatives and even calling its agents "thugs."

His tenure at the bureau was at times tumultuous, including a clash with Justice Department leadership over the administration's handling of the Jeffrey Epstein files.

But it also involved the arrest earlier this month of the man authorities say is responsible for placing two pipe bombs near the Democratic and Republican committee headquarters, hours before the assault on the U.S. Capitol on Jan. 6, 2021.

In an unusual arrangement, Bongino has had a co-deputy director since this summer when the Trump administration tapped Andrew Bailey, a former attorney general of Missouri, to serve alongside Bongino in the No. 2 job.

President Trump praised Bongino in brief remarks to reporters before he announced he was stepping down."Dan did a great job," Trump said. "I think he wants to go back to his show."
Copyright 2025 NPR

President Trump opened a primetime address to the nation on Wednesday with a message intended to reassure Americans. 

"Eleven months ago, I inherited a mess, and I am fixing it," he said at the start of his speech.

However, in his roughly 20-minute address from the Diplomatic Reception Room, Trump broke little new ground, restating messages his White House has been pushing for months: that current economic problems can still be blamed on former President Joe Biden, and that Trump's second term in office has thus far been a massive success.

Indeed, Trump took a familiar, hyperbolic tone in describing his term.

"Over the past 11 months, we have brought more positive change to Washington than any administration in American history," he said.

The address had the feel of a Trump rally speech, without the rally. Unlike the often sedate primetime addresses of past presidents, Trump spoke loudly throughout his speech, at times seeming to shout.

The president did announce one new policy, saying that nearly 1.5 million military service members will be receiving a "special warrior dividend" of $1,776, a reference to the nation's founding in 1776. Trump said the money will arrive "before Christmas" and that "the checks are already on the way."

Trump spoke as his approval rating on the economy has hit a new low of 36%, according to the latest NPR/PBS News/Marist Poll. The poll found that the cost of living in particular is weighing on Americans. Fully 45% said prices are their top economic concern right now, far ahead of the next-highest category — housing prices — at 18%.

In addition, the poll found that two-thirds of Americans are "very" or "somewhat concerned" about the impact of tariffs on their personal finances.

Nevertheless, in his address, Trump continued to tout tariffs as a major cause of the economic accomplishments he sought to highlight. That's despite the fact that the various tariffs President Trump has unilaterally imposed are driving prices higher, as Federal Reserve Chair Jerome Powell reported last week. He told reporters that inflation growth is happening entirely in goods (as opposed to services), and that the growth is "entirely in sectors where there are tariffs."

Though the president highlighted few new policies, he did tease that in the new year he would announce "some of the most aggressive housing reform plans in American history."

Trump also told Americans that better economic times are ahead, stressing that Americans will receive tax refunds from his "big, beautiful bill" next year.

Though he's recently mocked Democrats' focus on affordability, their focus on pocketbook issues is seen as why they swept key off-year elections in November. And the president has tried to address the issue, recently hitting the road to make his economic case. He pitched supporters in Pennsylvania last week by promising bigger tax returns in April thanks to his policies, as well as promoting "Trump accounts" for children born between 2025-2028.

Trump will have another opportunity to talk directly to voters on Friday, when he will deliver a speech in Rocky Mount, North Carolina.
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