Sponsored message
Logged in as
Audience-funded nonprofit news
radio tower icon laist logo
Next Up:
0:00
0:00
Subscribe
  • Listen Now Playing Listen

The Brief

The most important stories for you to know today
  • More cash for families if Congress passes bill
    A woman with medium brown skin and blond hair looks through the passenger window of her van. Her reflection is visible in the van's back window.
    Griselda Calito says she drives all over the city of Los Angeles from work to running errands and picking up her children every day.

    Topline:

    A bipartisan Congressional bill that would expand the child tax credit could benefit an estimated 2 million children in California, particularly in low-income families with multiple kids.

    Why it matters: When the Child Tax Credit was expanded during the pandemic, it cut child poverty substantially. For Griselda Calito, a mom of four, the extra payments helped her with paying rent, food and gas.

    What's new: While the tax credit expansion Congress is considering wouldn't be as generous as the one during COVID, experts say it would still help many families, particularly low-income families with young children.

    Rising costs: Griselda Calito, a mom of four, said extra money would help her pay for rent, food, and gas. With four growing kids, she says one of her biggest expenses is food, and has had to stretch her budget.

    A bipartisan Congressional bill that would expand the child tax credit could benefit an estimated 2 million children in California, particularly in low-income families with multiple kids.

    The measure passed the House last month, and is awaiting its fate in the Senate. And while it’s not as generous as the pandemic-era expansion, advocates say it could bring much-needed relief to families.

    “Our North Star is the full expansion again, but this will for sure have a tremendous impact for families, particularly right now as we're heading into tax season,” said Shimica Gaskins, president and CEO of Grace/End Child Poverty CA.

    In 2021, the credit temporarily expanded to $3,000 for children from 6 to 17 and $3,600 for children under 6, and was available on a monthly basis. It cut child poverty substantially. It was also fully refundable, meaning families could get back that money even if they didn’t owe that much in taxes.

    The child tax credit expansion is part of a larger bill, the Tax Relief for American Families and Workers Act. A representative for Sen. Ron Wyden, who chairs the U.S. Senate Finance Committee, said the goal is to get it passed soon after the Senate reconvenes next week.

    What’s the current policy?

    After the sunset of the pandemic expansion, the tax credit reverted back to $2,000 per child and is not fully refundable for every family. The new bill increases the amount some families with multiple children can receive and reinstates full refundability by 2025.

    For families who would benefit, it would mean an average of an additional $700 this year, according to estimates from the Urban-Brookings Tax Policy Center, but significantly more for some lower-income families.

    The expansion would help parents like Griselda Calito, a mother of four children who lives in West Hollywood. Back in 2021, she remembers the extra payments were like a lifeline.

    “It helped me a lot especially because COVID was happening — working was a little bit harder,” she said. “I'm a single mother, so I had to juggle taking care of the kids and working.”

    Calito worked then as a medical assistant at an OB-GYN clinic, and with the pandemic upending the healthcare system, she worked fewer hours. With four children under 10, she said the credit gave her about $900 a month.

    “I was able to feed them. I was able to have a roof over their heads. If they needed any clothes, toys, supplies, that was an extra income that helped me a lot,” she said. She also knew the extra payments were expiring at the end of 2021, so she tried to save as much as she could.

    That helped as she stopped working as a medical assistant in order to get an associate’s degree in administration of justice at West Los Angeles College. Last year, when she could squeeze in the time, she would drive for Uber.

    Under the new expansion proposal, Calito could get $5,700 in tax credits a year — about $350 more a month than under the current law. (The Washington Post built a handy credit calculator that we used for some tax calculation on our end, too.)

    Make the most of your tax filing

    The IRS says that even though the measure hasn’t passed yet, families shouldn’t wait to file. There are a number of ways families can get help with filing their taxes for free: 

    • Most Californians can file their state taxes with CalFile
    • For federal taxes, if you make less than $64,000, you can get free tax prep through Volunteer Income Tax Assistance (VITA). These programs are often at local community based organizations, libraries, and schools. You can find the ones closest to you through the IRS or United Way.
    • Parents without Social Security numbers can claim the Child Tax Credit if they’re children have social security numbers, according to the IRS. 
    • If residents have questions about their ability to file taxes and claim credits, they can call local nonprofits that help with free tax prep like Young & Healthy in Pasadena.

    “Rent and the food and everything is so expensive, so that extra income would help a lot,” she said. Calito tries to shop for groceries twice a month, after sitting down and making a list of all the expenses she’ll have to pay for the upcoming weeks.

    And with four growing children, especially her two boys, she says her groceries don’t go as far as they used to. “The way I'm calculating it, it's usually not enough because they're so hungry and obviously I'm going to feed them, so it's hard.”

    Aside from rent and food, gas is also one of her highest expenses. Calito drives a minivan, a necessity for a family with four kids — a 2005 Toyota Sienna. Between their schools and extracurricular activities, she’s on the road often.

    My boys eat — like, they could eat. They're growing and stretching their bodies and, you know, they're just hungry.
    — Griselda Calito, mother

    And aside from the essentials, she said extra income would help take her children out to places around the city. “As my kids are getting older, they want to do activities,” like going to the movies or the zoo.

    “I do spend a lot of time with my kids and I do like to do adventures with them,” she said. “So I try to at least accommodate having one or two outings with them. But if I can't afford it, then I’ll tell them ‘unfortunately I can’t this month, but hopefully next month, I'll take you guys.”

    Security for unexpected costs

    The expanded tax credit also represents a safety net, insurance against losing a job or extra support for families that add a child.

    Irene Sanchez, a treatment coordinator at a dental office and a mother of two kids, qualified for the pandemic expansion. She makes enough together with her husband that the new proposal wouldn’t benefit them this year. But if the expansion was as generous as it was during COVID, she would arrange more outings with her kids.

    “Sometimes even just creating healthy memories, like creating activities for them. It's an expense,” she said. “Having kids in California, it's not so easy all the time if you're not making a lot of money.

    The extra money would help with medical expenses, too, she said.

    “Having two kids and with my son starting preschool, one kid gets sick and he's sick at most like every other week,” Sanchez said.

    With her work schedule, Sanchez couldn’t go see her kids’ primary doctor during the day when they were sick, so she took them into urgent care, which costs about $50 a visit per kid. In December and January alone, Sanchez said her kids went around eight times for various colds and ear infections. That’s taken a toll on her family’s budget; if the tax credit increased to pandemic levels, it could mean a couple hundred dollars more a month.

    Ngoyzi Nwadiashi, a Hawthorne mother, had just immigrated to the U.S. during the start of the pandemic. When the expanded child tax credits were available each month, she said it was a huge relief, especially as she was looking for work.

    “It took a lot of stress and anxiety off me,” Nwadiashi said, who’s now a clinical care coordinator and in the process of taking her medical license exams. She makes about $36,000 a year. She would like to see the expansion match what families saw during the pandemic. Fifty dollars, for example, would mean a week’s worth of groceries for her five-year old daughter.

    “Any dollar that's added to my money is going to relieve me a whole lot — extra $60, extra $50, extra $10,” she said. "It goes a long way.”

  • 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?”

    The Associated Press receives support from the Walton Family Foundation for coverage of water and environmental policy. The AP is solely responsible for all content. For all of AP’s environmental coverage, visit https://apnews.com/hub/climate-and-environment