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The Brief

The most important stories for you to know today
  • Celebrate the Fourth all over L.A.
    The Hollywood Bowl shell is lit up with fireworks.
    Summer is in full force when the Beach Boys perform at the Hollywood Bowl, followed by fireworks.

    This week/weekend (EDIT)

    Watch traditional fireworks for the July Fourth holiday — or a not-so-traditional drone show. Catch a double road trip feature with Easy Rider and Beavis and Butt-Head. Laugh along at the Popular Kids Club.

    Our picks:

    • Firework shows, All Over- Fireworks (or a drone) shows galore in Woodland Hills, Long Beach, downtown L.A., Huntington Beach, and Big Bear.
    • Easy Rider / Beavis and Butt-Head Do America, New Beverly Cinema, 7165 Beverly Blvd., Fairfax- Watch a double feature of two different road trips across ‘Merica.
    • Popular Kids Club, Permanent Records Roadhouse, 1906 Cypress Ave., Cypress Park. 
      Keep the holiday vibes going with a few laughs.

    Watch traditional fireworks for the July Fourth holiday — or a not-so-traditional drone show. Catch a double road trip feature with Easy Rider and Beavis and Butt-Head. Laugh along at the Popular Kids Club.

    Events

    Monday, July 3 and Tuesday, July 4; 7:30 p.m. 

    July 4th Fireworks Spectacular with The Beach Boys
    Hollywood Bowl
    2301 N. Highland Ave., Hollywood
    Celebrate America’s independence by listening to The Beach Boys (with guest drummer John Stamos) as they play Southern California beach anthems with the Hollywood Bowl orchestra. Stick around for the post-show fireworks.
    COST: Tickets start at $39; MORE INFO

    A jazz trio of a bassist, trumpeter and drummer performs on a stage.
    Idyllwild Arts Academy's popular annual fundraiser, Jazz In The Pines, returns on Monday for two weeks of veteran and student jazz artists.
    (
    Courtesy of Idyllwild Arts / www.idyllwildarts.org
    )

    Monday, July 3 - Saturday, July 15

    Idyllwild Arts: Jazz in the Pines 
    Various locations around Idyllwild Arts Academy Campus
    Idyllwild
    If you’re road-tripping to the mountains this week or next, the Idyllwild Arts Academy holds its annual fundraising concert series with a lineup that includes both noted artists and students. Curated by jazz vocalist Rose Colella, headliners include Grammy Award-winning trumpeter John Daversa, Marshall Hawkins’ Seahawk MOJO, along with Euphoria Brass Band, Joshua White, Sherry Williams, Yve Evans, Rose Colella, Tom Hynes, Dan St. Marseille, Bob Boss, Frank Fontaine, Tina Raymond & The Idyllwild Arts All-Star Student Jazz Combo.
    COST: FREE - $500; MORE INFO

    Tuesday, July 4; 7:30 p.m.  

    LA Galaxy vs. LAFC & Fireworks Night
    Rose Bowl
    1001 Rose Bowl Dr., Pasadena
    While the Dodgers and their fireworks show take place farther down the 110, the 2023 AmericaFest event in Pasadena has been replaced by an LA Galaxy vs. LAFC opener, which was postponed from earlier this year. Ticketholders will be allowed to watch the fireworks from inside the stadium, but there are plenty of other places to catch the show around Pasadena.
    COST: Tickets start at $35; MORE INFO

    Tuesday, July 4 - Thursday, July 6; 7:30 p.m. 

    Easy Rider / Beavis and Butt-Head Do America
    New Beverly Cinema
    7165 Beverly Blvd., Fairfax
    Watch a double feature of two different road trips across ‘Merica. The first stars Peter Fonda and Dennis Hopper as bikers/drug traffickers who are joined by lawyer Jack Nicholson on their trek to Mardi Gras. The second stars, well, Beavis and Butt-Head, in a madcap adventure to recover their stolen TV.
    COST: $13; MORE INFO

    Tuesday, July 4; 1 - 7 p.m.

    Fourth of July ADLT SWM
    Tropicana at the Hollywood Roosevelt
    7000 Hollywood Blvd., Hollywood
    Before the fireworks and BBQs, head to the Roosevelt for a pool party featuring DJs spinning house, Nu-Disco and indie dance tunes. Food and drinks will be available for purchase. Ages 21+ only.
    COST: FREE with RSVP; MORE INFO

    Tuesday, July 4; 4 - 9:30 p.m.

    Gloria Molina Grand Park’s 4th of July Block Party
    Grand Avenue to Los Angeles Street and from Temple Street to 2nd Street, downtown L.A.
    This year’s Grand Park festivities will not include traditional fireworks, but instead, partygoers will be dazzled by a 3-D drone show to light up the nighttime sky. More than 500 drones will fly above Jerry Moss Plaza right across from Grand Park beginning at 9 p.m. The family friendly festival includes performances by Maya Jupiter, DJ Ethos, Medusa, Georgia Anne Muldrow and Cut Chemist + Chali 2na.
    COST: FREE; MORE INFO

    Catch old-fashioned fireworks and festivities all over Southern California, including:

    Tuesday, July 4; 9:30 a.m. 

    Santa Monica 4th of July Parade
    Main Street, from Pico Boulevard / Ocean Park Library
    The Ocean Park Association hosts a hometown parade toward the beach featuring dancers, live bands, classic cars and costumed performers. Spectators (including leashed doggies) are welcome all along the route.
    COST: FREE; MORE INFO

    Tuesday, July 4; 6:30 p.m. 

    Tuesday Night Cafe - The Taking Up Our Space Show!! + BBQ Boogie
    Union Center for the Arts 
    120 Judge John Aiso St., downtown L.A.  
    The performing and visual arts series holds its regular happening on July 4th with a BBQ starting at 6 p.m. With the theme, The Taking Up Our Space, the night features a number of Asian American artists whose work “surrounds the way we imagine, take, and create space for ourselves as a community and as individuals.” The lineup features beats by DJ Lomo with Mujo Dream Flight, Tejal Patel, Cynthia Cheng, Mary Rose Go and Audrey Kuo, plus the open mic lottery. Virtual viewing option available.
    COST: FREE; MORE INFO

    Thursday, July 6; 7:30 p.m.

    Nope on 70mm  
    Academy Museum of Motion Pictures
    6067 Wilshire Blvd., Mid-Wilshire
    In celebration of the final weeks of the exhibition Regeneration: Black Cinema 1898–1971, the Academy Museum screens contemporary films that have sprung from the earlier period. Regeneration, Remixed presents Jordan Peele’s sci-fi western Nope (in 70mm) with a pre-screening conversation with writer-artist Harmony Holiday, filmmaker Nicole Miller and cultural critic and educator Jared Sexton with moderator Mason Richards.
    COST: $5 - $10; MORE INFO

    Thursday, July 6; 8 p.m.

    Popular Kids Club
    Permanent Records Roadhouse
    1906 Cypress Ave., Cypress Park 
    Keep the holiday vibes going with a few laughs. The popular outdoor comedy show returns with headliners Iliza Shlesinger and Jon Daly, along with Avra Friedman, Chris Garcia, Nick Taravella and Julia Austin.
    COST: $8 - $12 MORE INFO

    Viewing Pick

    Ring, Ring: A Doorbell Cam Fantasia
    The IRL screening of Ring, Ring: A Doorbell Cam Fantasia takes place at Vidiots in Eagle Rock on Thursday, July 6 at 7:30 p.m. Presented by the Museum of Home Video, a weekly found footage livestream for film fans and stoners alike, the program includes a new feature-length edit of doorbell camera footage (porch thieves, pranksters, et al.) that’s “chilling and all-too-real.” Plus, also watch horror movie ephemera. Tickets run $9 - $12.

    A pair of tongs reaches for a strawberry danish among a number of other pastries.
    Bastion Bakery is the newest addition to the Grand Central Market in downtown L.A.
    (
    Courtesy Grand Central Market
    )

    Dine and Drink Deals

    Here are a few dine and drink options to indulge in this week.

    • On Wednesday, July 5, Ray Garcia’s asterid in downtown L.A. launches Wine Wednesdays. Diners can enjoy half-off all bottles of wine as well as a rotating featured selection of wines (reds, whites, rosés and orange) available by the glass for $12.  
    • Ms Chi Cafe in Culver City launches a happy hour on Wednesday, July 5, running Wednesdays through Fridays from 4 to 6 p.m. Guests can indulge in a $6 happy hour menu of savory small bites, including Chef Shirley Chung’s lion’s head meatballs, chicken jiaozi and vegan garden dumplings; along with a selection of house wines and draft beers (also $6). 
    • La Venta Inn in Palos Verdes Estates holds a Fireworks Viewing Party on July 4, with great views from the Queen Necklace coastline and fireworks shows all around L.A. Meg Walker of Made by Meg Catering creates classic American BBQ Bites, including burgers, hot dogs, salads and more, plus a few additional food stations in addition to beer, wine and soft drinks. Tickets range from $32.20 – $67.85.
    • On Monday, July 3, from 7 a.m. to 9 p.m., spcaLA holds a fundraiser at Hof’s Hut Restaurant and Bakery (2147 Bellflower Blvd., Long Beach). Help raise funds for shelter pets when dining in or take out, as the restaurant will donate 20% of the meal price (when you mention spcaLA). Please RSVP if you are participating because they must meet the minimum number of RSVPs for the fundraiser to go into effect.
    • La Monarca Bakery has launched four new iced drinks just in time for the summer heat. Enjoy the sweet flavors of Mexico in the Matchata, matcha green tea and horchata mix spiced with cinnamon; horchata de olla — café de olla, horchata, cinnamon, with cold foam; hibiscus lime tajin, a spicy, sweet drink with real Tajin; and the mango lime tajin that’s a fruity, tart and sparkling beverage with real Tajin.
    • New bakery alert: Bastion Bakery (pictured above) by Sara and Julian Partovi, in partnership with Carlos Enriquez of Bakers Kneaded, is now open at Grand Central Market in downtown L.A. Offering seasonal treats including pistachio croissants, gluten-free donuts, freshly baked baguettes, cakes, pies and their own BK Buns. Open daily from 8 a.m.

  • DOJ wanted to stop counting of 20K ballots
    People extract ballots from their envelopes and prepare them to be scanned for counting in the Vote-By-Mail Processing Boards area at the Orange County Registrar of Voters Facility in Santa Ana, Calif. on Oct. 28, 2026.

    Topline:

    A federal judge has denied an unprecedented, emergency request by the Department of Justice to segregate thousands of California ballots in the midterm elections.

    What the court said: In his 26-page ruling issued this evening, U.S. District Judge David Carter, a Clinton appointee, denied the Justice Department's request for a temporary restraining order to stop processing the ballots in question. "Never before in American history has the federal government, on the eve of an election, sought to coerce a state and local government to abandon their own Constitutional elections procedures and bend to the will of the Executive Branch," he wrote. Carter also expressed concern about taking action that could disenfranchise eligible voters and create chaos.

    The backstory: The Justice Department wants California election officials to stop processing ballots pertaining to 20,000 individuals that federal officials say are "likely" noncitizens. State and local officials in California have countered that the DOJ’s list of “likely” noncitizens is unreliable, with a preliminary analysis by Los Angeles County showing that many on the list do not have active voter registrations.

    What's next: The judge said that the federal government can address the issue by continuing to indict people for the crime of illegally voting as noncitizens. DOJ officials say in the last two months they have charged dozens of people for registering or voting without being a U.S. citizen.

    A federal judge has denied an unprecedented, emergency request by the Department of Justice to segregate thousands of California ballots in the midterm elections.

    The Justice Department wants California election officials to stop processing ballots pertaining to 20,000 individuals that federal officials say are "likely" noncitizens.

    State and local officials in California have countered that the DOJ's list of "likely" noncitizens is unreliable, with a preliminary analysis by Los Angeles County showing that many on the list do not have active voter registrations. The officials also claim that setting aside ballots just days before Election Day, when voting and processing mailed ballots are already underway, would be unlawful and infeasible and would disenfranchise eligible voters.

    In his 26-page ruling issued Wednesday evening, U.S. District Judge David Carter, a Clinton appointee, denied the Justice Department's request for a temporary restraining order to stop processing the ballots in question.

    "Never before in American history has the federal government, on the eve of an election, sought to coerce a state and local government to abandon their own Constitutional elections procedures and bend to the will of the Executive Branch," he wrote.

    Carter also expressed concern about taking action that could disenfranchise eligible voters and create chaos.

    "Once a vote is segregated, lasting harm has occurred," Carter wrote at the conclusion of his order. "If the Executive can discount votes and threaten an ongoing election due to unproven allegations, then our democracy is in danger. This Court declines to be a party to such process."

    The judge said that the federal government can address the issue by continuing to indict people for the crime of illegally voting as noncitizens. DOJ officials say in the last two months they have charged dozens of people for registering or voting without being a U.S. citizen.

    The DOJ's lawsuit in California, which was filed Oct. 15, is among a flurry of unprecedented actions the department has waged in states close to Election Day, raising alarms about federal interference in state election procedures.

    Like in California, on Monday federal prosecutors asked Washington state election officials to review a list of 400 registered voters the DOJ believes are likely noncitizens. And last week, the DOJ filed an unusual lawsuit in Alaska that seeks to stop the state from certifying the results in its Senate race if the Republican incumbent loses due to votes for a longshot candidate with a similar name who is accused of being a spoiler candidate.

    In California's most recent motion to the court, state Attorney General Rob Bonta, a Democrat, asked the judge to take into account the circumstances of DOJ's demand. "This litigation is a precursor to further interference here in California," Bonta wrote. "The Court must not be drawn into this chilling degradation of democratic values and constitutional principles."

    The Department of Justice is expected to appeal Carter's denial, and the matter could ultimately wind up before the U.S. Supreme Court.

    The DOJ has argued the issue is urgent since ballots are already being processed. Once signatures are verified on returned mail ballot envelopes, the ballots are separated from their envelopes to retain voter confidentiality and it then becomes impossible to retrieve an ineligible ballot.

    Federal prosecutors have argued that votes by noncitizens dilute the votes of U.S. citizens. Voting by noncitizens has been shown by audits and investigations to be extremely rare.

    The accuracy of the DOJ's list of "likely" noncitizens is still an ongoing matter of dispute.

    A Los Angeles County analysis of a small sample of people on the DOJ's list found that a significant portion had said in records they were born in the U.S. But U.S. Citizenship and Immigration Services senior official Nicolas Bartell contested that in recent court filings, writing that his office's review of those individuals found none were U.S.-born.

    Bartell did acknowledge the review found four of those people "might have a claim to U.S. citizenship."

    He also provided the court additional details about the federal government's methodology in creating the list in recent court filings.

    But University of Delaware political scientist Kassra Oskooi, who has been tapped as an expert witness by voting rights groups who are intervening in the case, responded in his own declaration to the court that he believes USCIS's matching protocol "is likely to be unreliable."

  • Sponsored message
  • State officials may pull project funding
    A view from above of a pair of green hills at the bottom of the frame and the ocean in the horizon.
    Catalina Island is home to more than 4,000 residents, who live with slow, unreliable internet connection.

    Topline:

    California’s Public Utilities Commission will decide whether to claw back or keep $37.5 million in grant funding to bring fast, reliable internet to Catalina Island.

    Background: Last December, the CPUC awarded a grant to telecom company AVX Networks to install subsea fiber internet infrastructure between Orange County and the island.

    Why it matters: Catalina Island is home to more than 4,000 residents, and it draws thousands of tourists each year, but the internet connection is often slow and unreliable. The lack of a reliable internet connection affects critical services on the island such as remote learning and emergency response.

    Read on … for more on where things stand.

    California’s Public Utilities Commission will decide on Thursday whether to claw back or keep $37.5 million in grant funding meant to bring fast, reliable internet to Catalina Island.

    The island is home to more than 4,000 residents, and it draws thousands of tourists each year. Its slow, unreliable internet connection affects everything from remote learning to emergency response.

    Lance Ware is CEO of AVX Networks, the company awarded the grant from the CPUC in December 2025. He told LAist host Nereida Moreno that the island depends on a very limited wireless internet link.

    “When the town is busy, for instance, a cruise ship comes … the internet just gets crippled along with all the telephone services,” Ware explained.

    Months after AVX Networks was awarded the grant, CPUC staff accused the company in July 2026 of breaking federal spending rules, citing insufficient justification and documentation for invoices.

    The proposed plan would build the fiber-optic network under the San Pedro Channel from two points on Catalina Island to landings near Huntington Beach. Those cables will then connect to the Middle Mile Broadband Network in Stanton.

    Where do things stand today? 

    CPUC staff allege that AVX Networks violated several program requirements, according to records.

    “Since the award, AVX Networks has not shown itself to have the requisite administrative, technical, and operational capacity to deliver on its project, and AVX Networks has failed to comply with the terms and conditions of its award,” the CPUC agenda item records state.

    Ware said he “vehemently disagrees” with those statements.

    “There are allegations on things in there that do not make sense to us in that we've had no due process or cure and correct period to address,” Ware said.

    What’s next? 

    If the commission terminates the contract and pulls the funding, Ware said the project will be delayed, but not stopped.

    “This is not curtains down for us,” Ware added. “It's gonna take longer, and we'll have to find some other way to finance it, but we certainly haven't given up.”

    How to participate in CPUC meetings

    California’s Public Utilities Commission meets on Thursday, Oct. 29 at 11 a.m. You can watch the meeting remotely here.

    To make public comments over the phone: Call (800) 857-1917. When prompted by the operator, unmute your phone and press *1 (star one). You will be prompted to state your name and/or organization. The operator will call on you when it’s your turn to speak.

    To make a written comment: You can submit comments on the CPUC docket page.

    Nereida Moreno contributed to the reporting of this story.

  • All the tax measures on the LA, OC ballots
    An illustrated wallet with cash, a receipt and coins sits before a Los Angeles street scene with palm trees and skyline.
    More than 30 cities in L.A. and Orange counties have tax increases of some kind on the Nov. 3 ballot.

    Topline:

    By LAist’s count, over 30 cities in Los Angeles and Orange counties are asking residents to approve tax measures on Election Day this Tuesday.

    Why now? Municipalities cite stagnant revenues that haven’t kept pace with the rising costs of insurance, maintenance and infrastructure projects, and employee pensions. As a result, big cities, suburbs and small towns alike are all facing multimillion-dollar budget deficits. So they are asking residents to open their wallets — or potentially see deep cuts to basic city services.

    Read on ... to find out if possible hikes are coming your way.

    Southern Californians are feeling squeezed by the rising costs of, well, everything. And now their local governments are asking for more money, too.

    By LAist’s count, more than 30 cities or districts in Los Angeles and Orange counties are asking residents to approve tax measures on Election Day, Nov. 3, citing stagnant revenues that haven’t kept pace with the rising costs of insurance, maintenance and infrastructure projects, and employee pensions. Big cities, suburbs and small towns are all facing multimillion-dollar budget deficits and asking residents to open their wallets — or potentially see deep cuts to basic city services.

    The list of local measures on ballots from Culver City to San Clemente includes sales taxes, hotel taxes, business taxes, parcel taxes and utility taxes. Some ballot measures would extend or increase existing taxes while others are brand-new.

    Much of the answer to why so many tax measures are on the ballot lies in Proposition 13, which capped property taxes in 1978.

    Before Prop. 13, cities and counties relied on property taxes for nearly all of their revenue. In the decades since, they’ve increasingly turned to other types of taxes. Hotel and utility taxes, for example, were essentially nonexistent before the mid-1970s, and sales taxes represented a small sliver of revenue. Even as these taxes have grown, they’ve struggled to replace property tax revenue.

    How Proposition 13 reshaped local taxes 

    • Before 1978, California municipalities could raise taxes without voter approval. But in addition to capping property taxes, Proposition 13 also changed the rules for other taxes. Section 4 of Proposition 13 states that any special taxes (which are taxes designated for a specific use) must be approved by two-thirds of voters. A later proposition passed in 1986 requires that general taxes be approved by a simple majority of voters. General taxes are general purpose funds that cities can allocate as they please.
    • The rules could change again this year with Proposition 43, which would raise the share of votes needed to pass local special tax measures proposed by citizens to two-thirds. Currently, citizen-led special tax initiatives only need to win a simple majority. 
    Despite what the Nov. 3 ballot might suggest, sales tax measures are actually becoming less common, according to Michael Coleman, author of the California Local Government Finance Almanac. “More and more governments have started to exhaust the capacity for that. There’s a limit in how much you can do both legally and in terms of the tolerance of voters,” Coleman said.

    State law caps the maximum combined local and county sales tax rate, and many Southern California cities are already at or near that cap, Coleman said. And sales tax isn’t as reliable as it used to be, amid the broader retail downturn and shift to a service-based economy (most services aren’t taxable in California).

    All of that means cities are increasingly turning to “ticky-tacky, peculiar taxes” to come up with revenue, according to Kirk Stark, a professor of tax law and policy at UCLA.

    The “conventional tax instruments” — property, income and sales taxes — are all limited by state law, Stark said. “Local governments that are hoping to satisfy demand for any kind of public expenditure have to turn to other, less conventional sources of revenue.”

    This year, cities are asking Southern Californians to say yes to a wide range of taxes. Below, we look at three examples in South Gate, Orange and Diamond Bar.

    South Gate: A utility users tax

    South Gate is asking voters to approve something less common: a utility users tax, or UUT for short. If Measure SG is approved, the 8% tax would be added to bills for utilities such as electricity, water, natural gas, cable and phone service. The tax would bring in an estimated $10.4 million per year.

    The city is facing a potential fiscal emergency and a $9.4 million budget deficit. Earlier this year, South Gate began cutting back services, including eliminating its crossing guard program and assigning fewer police officers per shift.

    At a City Council meeting on the tax measure earlier this year, several residents spoke against the measure, with some calling the deficit a result of potential financial mismanagement that shouldn’t be pushed onto residents. Others said the monthly costs would simply add a new burden to already tight budgets.

    “Being a homeowner here for the past 13 years, I have seen my utilities go up as well as the cost of living, my insurance for my house, and my car insurance go up. I believe there’s got to be a way to fix this problem without the UUT measure,” one resident told the City Council.

    “I’m extremely frustrated that you now want to do electricity, water, sewer, cable, cell phone, gas. ... That hurts us. You’re passing that on to us, and that is absolutely not acceptable,” said another.

    The only other utility users tax on the ballot in Los Angeles or Orange counties this year is in San Marino, where residents will decide whether to extend the city’s existing 5% utility users tax, which is set to expire on March 31, 2027, and increase it to 6%. Last year, the tax provided almost $2.2 million in revenue. As of 2021, a total of 162 out of 540 California cities and counties had a utility users tax, according to Coleman’s California Local Government Finance Almanac.

    Orange: Hotel and sales taxes could go up 

    Most people don’t book a hotel in their own city. That’s made hotel taxes an easier pill to swallow for voters, since the tax is mostly levied on visitors.

    The city of Orange is asking voters to approve Measure J, which would raise the hotel tax from 10% to 14%. Orange is one of 10 cities across Los Angeles and Orange counties where voters will decide in November whether to increase or establish a local hotel tax, also known as a “transient occupancy tax.”

    Orange residents will also vote on a 1-cent sales tax measure, as the city projects a $27.6 million deficit that it calls “one of the largest financial challenges in the city’s history.” The sales tax is expected to bring in $37 million annually, and the hotel tax would add $3 million.

    Diamond Bar: A new 1-cent sales tax 

    Diamond Bar voters will decide on Measure Q, a 1% local sales tax that would add a penny per dollar to purchases of taxable items. The city estimates the tax will bring in an additional $6 million annually, which could help plug a projected budget deficit of $5 million a year by 2030.

    “The city’s challenge is simple: costs for city services are going up faster than revenues,” states Diamond Bar’s fact sheet on the measure, which cites rising public safety costs and $100 million in infrastructure and maintenance needs.

    Several other cities have local sales tax measures on the ballot, including Santa Ana’s 1.5% sales tax extension and Los Angeles’ sales tax increase for the Los Angeles Fire Department, Measure FD.

    “There’s a variety because circumstances among these local governments vary. The types of economies among governments vary, the local conditions, even the preferences for what type of revenue measure or tax measure might work varies,” Coleman said. “A local government that’s looking at one of these is going to look at a number of different options and consider what might be most palatable to the voters in their community.”

    What’s on your ballot?

    Our LAist Voter Game Plan is here to help guide you through the Nov. 3 election with guides to races across Los Angeles and Orange counties — and that long list of state propositions — to help you cast a ballot that’s in line with your own personal beliefs and values.

    But the one thing we don’t do? We don’t tell you how to vote. That part is left up to you.

    You can find it all at LAist.com/Vote.

    Further reading

  • LA fires exposed millions to materials
    Person in a red helmet and yellow protective clothing aims a hose at a burning pickup truck as flames and thick orange smoke fill the street.
    A firefighter battles the Eaton Fire, Jan. 8, 2025, in Altadena, Calif.

    Topline:

    At the height of the Los Angeles fires in 2025, millions of residents were exposed in a 24-hour period to toxic lead levels from smoke that were 80 times higher than the typical background level, according to a new study. Researchers from the California Institute of Technology compared the chemical composition of smoke from the Eaton Fire with that of a wildfire and found that the urban plume had more lead, arsenic and halogens (which include chlorine and bromine) linked to burning vehicles, building materials and electronics.

    Why it matters: “The main, key finding is really that wildfire smoke is very different fundamentally from the urban smoke,” said Nga Lee “Sally” Ng, an author of the study published Wednesday in the journal Science Advances. With the new technology they used to measure what was in the smoke, they were able to “actually see the very detailed component of these particles that we are breathing.”

    Health effects: Ed Avol, professor emeritus in the Keck School of Medicine at the University of Southern California who has researched the health effects of air pollution for decades, said significant exposure to heavy metals is consistent with what he’d expect, “but certainly surprising because we haven’t been able to document this sort of thing.” “One of the real advantages of this study is that it had the opportunity to make measurements sort of hour-by-hour across the sampling network. And typically we make measurements of airborne particulates and so forth a couple of times a week, at best,” said Avol, who wasn’t involved in the study.

    The backstory: The two wind-whipped infernos in Altadena and the Pacific Palisades that ignited on Jan. 7, 2025, killed at least 31 people and destroyed more than 16,000 structures, mostly homes, and everything in them — cars, paint, furniture, chemicals under sinks and more. Millions of people were exposed to smoke, which across the entire United States has been linked to tens of thousands of deaths annually. A recent study found that metal mixtures in the leftover smoke, ash and debris from the deadly 2023 Maui wildfires were harmful to the lung health of people living nearby long after the burning ended.

    At the height of the Los Angeles fires in 2025, millions of residents were exposed in a 24-hour period to toxic lead levels from smoke that were 80 times higher than the typical background level, according to a new study.

    Researchers from the California Institute of Technology compared the chemical composition of smoke from the Eaton Fire with that of a wildfire and found that the urban plume had more lead, arsenic and halogens (which include chlorine and bromine) linked to burning vehicles, building materials and electronics.

    “The main, key finding is really that wildfire smoke is very different fundamentally from the urban smoke,” said Nga Lee “Sally” Ng, an author of the study published Wednesday in the journal Science Advances. With the new technology they used to measure what was in the smoke, they were able to “actually see the very detailed component of these particles that we are breathing.”

    Co-author Haroula Baliaka said understanding the different chemical compositions of smoke from an urban versus a wildland fire helps bridge a missing gap in research. Wildfires are growing larger, more intense, faster-moving and more frequent largely because of drier and warmer weather associated with human-caused climate change. As urban growth and climate change push more fires into cities, researchers said monitoring and emergency response will have to adapt.

    Ed Avol, professor emeritus in the Keck School of Medicine at the University of Southern California who has researched the health effects of air pollution for decades, said significant exposure to heavy metals is consistent with what he’d expect, “but certainly surprising because we haven’t been able to document this sort of thing.”

    “One of the real advantages of this study is that it had the opportunity to make measurements sort of hour-by-hour across the sampling network. And typically we make measurements of airborne particulates and so forth a couple of times a week, at best,” said Avol, who wasn’t involved in the study.

    Thousands of structures burned, releasing toxic chemicals

    The two wind-whipped infernos in Altadena and the Pacific Palisades that ignited on Jan. 7, 2025, killed at least 31 people and destroyed more than 16,000 structures, mostly homes, and everything in them — cars, paint, furniture, chemicals under sinks and more. Millions of people were exposed to smoke, which across the entire United States has been linked to tens of thousands of deaths annually. A recent study found that metal mixtures in the leftover smoke, ash and debris from the deadly 2023 Maui wildfires were harmful to the lung health of people living nearby long after the burning ended.

    During the fires, researchers measured trace elements of fine particulate matter, or PM2.5, every hour reported by instruments in the Atmospheric Science and Chemistry mEasurement NeTwork ( ASCENT ), a relatively new network of air quality monitors across the U.S. that measures the size and chemical composition of these particulates in real time. Ng said ASCENT is the U.S.'s first measurement network able to measure the chemical composition of airborne particles in real time.

    Researchers were able to see what chemicals were in the smoke, track how its composition changed over the fire’s course, and distinguish emissions coming from burning structures. From there, they estimated how many people across Los Angeles were exposed to the heavy metals, particularly lead, during the fire’s first days.

    They compared the typical value of lead before the fires and the chemical makeup of smoke from a 2024 fire in Riverside County that burned mostly vegetation with data from the Eaton Fire plume. Contrasted with the wildfire smoke, the plume from the LA fire contained 50 times more lead, three times more arsenic, and seven times more halogens. At the peak of burning, about 7 million people were exposed for 24 hours to lead levels more than 80 times what’s typical.

    Lead is a neurotoxin that can stunt children’s development, lower IQ scores and increase blood pressure in adults. Scientists still don’t know how short-term, high exposure to lead impacts human health. Arsenic exposure is associated with various cancers.

    Yaguang Wei, assistant professor in the department of environmental medicine at Icahn School of Medicine at Mount Sinai who researches the health impacts of air pollution, wildfire smoke and severe weather, said their findings reinforced some conclusions of a recent study he co-authored that found, in part, that PM2.5 from wildfire smoke was more toxic than particulates from other sources.

    “I think their findings are not surprising,” said Wei, who was not involved in the study. When fires burn properties, they’re also burning “a lot of lead on your wall paint and the plastics and electronics and those are very toxic” when they burn, he said.

    Monitoring, policies and emergency response need to adapt, experts say

    Wei said the study has “important policy implications.” He thinks governments should take stronger actions to protect public health during these fires by investing in more wildfire monitoring and public alerts, and having more prescribed fires.

    For Avol, the study is a reminder of our “strange and increasingly dangerous new world” where urban and wildland intersect — and increasingly catch fire.

    “It reminds us to be cautious and be concerned and, you know, think about what we can do to minimize this. We’re not going to stop using all these materials containing metals and halogens and so forth in our homes,” he said. “How do we protect people from being exposed to that?”

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