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The Brief

The most important stories for you to know today
  • A heat wave could disrupt a so far quiet season
    A wildfire burns through brush, filling the sky with smoke and enveloping trees in the background.
    The Gifford Fire burned over 130,000 acres in Santa Barbara and San Luis Obispo counties in 2025.


    Topline:

    With fires devouring millions of acres in the Western U.S., Canada, and Europe, California stands out for what has been, so far, a below-average summer. California has benefited from lucky weather conditions so far, but that's about to change with a heatwave in the forecast.


    Study connects wildfires and heatwaves: National Weather Service offices across the state are warning of soaring temperatures starting later this week. The Los Angeles/Oxnard office said conditions will shift to “dangerously hot” by Friday. A recent study published in the journal Science Advances found that just under half of the burned area in warm-season months from 2001 to 2024 occurred during or in the wake of a heatwave, particularly in forests.

    Heatwaves and climate change: Heatwaves, defined as at least three days in a row with temperatures soaring past the 90th percentile, make up 15% or less of the warm season. But climate change is fueling an increase. Heatwaves create chronic conditions that lead to drier, more flammable fuels. They also mean hotter nights, which previous research found increases nighttime fire intensity, shuttering a critical window for fire suppression. The researchers found that heatwaves can also prime conditions for lightning, which has sparked some of California’s biggest blazes.

    The fast-moving Dove Fire near a Yosemite gateway town jolted California out of a relatively quiet fire summer, forcing road closures and the evacuations of hundreds of homes.

    Former U.S. Forest Service firefighter John Buckley wasn’t surprised to see the fire taking off last Sunday. Driving through the area in the Central Sierra foothills earlier that day, he remembers telling his wife those fuels looked ready to burn.

    “We drive back, and they're burning over at the city of Sonora,” said Buckley, now the executive director of the Central Sierra Environmental Resource Center. “The fuels are now quite primed for burning, and they're only going to get drier.”

    Firefighters have gained the upper hand against the 226-acre blaze, which Cal Fire suspects was set by a reckless 30-year-old man. But high temperatures are looming — and new research puts numbers to the intuitive follow-on: with heat, comes fire.

    It’s far too early in California’s fire year to make any conclusions or predictions. But with fires devouring millions of acres in the Western U.S., Canada, and Europe, California stands out for what has been, so far, a below-average summer.

    To date, roughly 4,030 wildfires have burned a little over 208,000 acres in the state — down from a five-year average of nearly 5,300 fires burning more than 300,000 acres at this point, according to Cal Fire data.

    Still, Cal Fire Battalion Chief David Acuña says he avoids the word ‘quiet.’

    “There is a superstition that when you use words like ‘quiet, slow, bored’ in the fire station, that just means that you're about to get hit with an amazingly busy shift,” he said.

    California has benefited from lucky weather conditions so far, despite a low snowpack and blistering March, according to John Abatzoglou, a professor of climatology at UC Merced.

    That’s about to change. “Now, of course,” he said, “we have a heat wave on our doorstep.”

    National Weather Service offices across the state are warning of soaring temperatures starting later this week. The Los Angeles/Oxnard office said conditions will shift to “dangerously hot” by Friday.

    That combination — heat waves and fire activity — is a common feature of western wildfires, Abatzoglou’s team found in a recent study published in the journal Science Advances and led by scientist Dmitri Kalashnikov. 

    The paper found that just under half of the burned area in warm-season months from 2001 to 2024 occurred during or in the wake of a heatwave, particularly in forests.

    Heatwaves, defined as at least three days in a row with temperatures soaring past the 90th percentile, make up 15% or less of the warm season. But climate change is fueling an increase.

    Abatzoglou pointed to a few reasons for the link. Heatwaves create chronic conditions that lead to drier, more flammable fuels. They also mean hotter nights, which previous research found increases nighttime fire intensity, shuttering a critical window for fire suppression. The researchers found that heatwaves can also prime conditions for lightning, which has sparked some of California’s biggest blazes.

    “And then it’s off to the races in terms of fire activity,” Abatzoglou said.

    The paper’s findings don’t mean all heatwaves will bring an uptick in fire activity, he added. That still requires ignitions in the right place, at the right time.

    Acuña cautioned Californians against creating those sparks. That means mowing before 10 a.m. on hot days or skipping the yard work during a red flag warning. It also means securing tow chains so they don’t drag and spark against the road, and not parking hot cars on dry grass.

    California sought and received federal funding assistance related to the Dove Fire within hours. But a separate, monthslong fight between Sacramento and Washington continues over slower-moving wildfire recovery funds — including hundreds of millions in aid tied to last year's L.A. fires that Gov. Gavin Newsom said in May FEMA was still sitting on.

    As for predictions for the season ahead, Acuña likes to make them about as much as he likes the word ‘quiet.’

    “It depends on what the weather brings us,” he said. “If it brings us hot, windy, red flag warning conditions, then that could certainly be a problem. If it brings us rain, well, that brings us a totally different concern. We are ready to respond.”

    This article was originally published on CalMatters and was republished under the Creative Commons Attribution-NonCommercial-NoDerivatives license.

  • Service from South OC to Oceanside suspended
    A passing train along the coastline.
    Metrolink’s Orange County service between the Laguna Niguel/Mission Viejo and Oceanside stations will be temporarily suspended starting Monday, Oct. 26, through Friday, Oct. 30, due to high tide forecasts.

    Topline:

    Metrolink’s Orange County service between the Laguna Niguel/Mission Viejo and Oceanside stations will be temporarily suspended next week, starting Monday, Oct. 26, through Friday, Oct. 30.

    What lines will run? Orange County Line trains will operate only between L.A. Union Station and the Laguna Niguel/Mission Viejo Station. According to Metrolink, alternate transportation such as buses will not be available.

    Why now? A coastal flood warning is in effect for the entire Orange and San Diego coastline Sunday through Thursday. “Astronomical” high tides could create significant coastal flooding starting Sunday, according to the National Weather Service. Morning high tides could reach nearly 7 feet Saturday morning and are likely to exceed 7.5 or 8 feet by Monday.

    Officials said: “The temporary service adjustment is intended to minimize the potential for widespread delays and cancellations if coastal conditions disrupt rail operations,” Metrolink officials wrote in an announcement Thursday. “This shift will also reduce competing rail traffic and shorten potential weather-related delays for other carriers, including Amtrak Pacific Surfliner and freight trains, that operate along the beachfront corridor near San Clemente.”

    Background: The service suspension is along the troubled rail corridor from South Orange County to the San Diego County line. Erosion and landslides along the coastal rail have caused disruptions since 2021.

    Dig deeper … The OC Transit Authority is in the middle of creating its 30-year plan for the coastal rail. 

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  • E-bike criminal charges
    More than a dozen e-bikes parked in front of a metal fence with a sign on it that reads "Newport Theatre Arts Center."
    Students at Ensign Intermediate School have been parking their e-bikes in the neighborhood since the district outlawed them on elementary and middle school campuses.

    Topline:

    The Orange County District Attorney’s Office filed charges Wednesday against six parents and one relative of children involved in illegal e-motorcycle use. O.C. District Attorney Todd Spitzer joined AirTalk, LAist 89.3's daily news show, to talk about the charges and rising e-bike-related incidents.

    What he's saying: "We have about a 430% increase in emergency room visits by young people today, underage minors, who are being injured as a result of these e-bikes," Spitzer said, referring to incidents in Southern California.

    A growing issue: Spitzer pointed out that Wednesday’s charges are the latest in a growing number of cases involving e-bikes, including one incident that resulted in a 13-year-old rider’s death.

    Why charge the parents? Spitzer clarified that parents are not being charged with a crime just for giving their child an e-bike. "We're filing when the adult who's responsible for the actions of that child has additional special knowledge that their kid is a danger to the community and, in most cases, to themselves," he said, such as a history of reckless riding or knowledge of illegal modifications.

    Example: In the case of the 13-year-old who died after crashing his e-motorcycle, his father could face up to six years in prison.

    Listen to the full conversation:

    Listen 9:51
    Orange County D.A. announces charges tied to e-bike usage

  • Book vendors, panels and more return Nov. 14
    A line of books sit spine-up on a table.
    The third annual OC Book Fair returns to Old Town Tustin on Nov. 14.

    Topline:

    The third annual OC Book Fair returns to Old Town Tustin on Nov. 14 with bookish activities, local authors, shopping and more. A portion of El Camino Real will be closed for the free event.

    What to expect: Attendees will be able to watch author talks, get books signed, participate in community roundtables and more. The fair lineup features indie bookstores, including local shops like Arvida Book Co., Heartbound Book Shop and the Untold Story Bookstore.

    What you need to know: The fair will take place from 10 a.m. to 5 p.m. along El Camino Real between Main and Second streets and on Third Street between C Street and Prospect Avenue.

    What about parking? Free street parking will be available throughout Old Town Tustin, as well as at the Tustin Public Library and the Civic Center. More free parking will also be available at the C Street Parking Structure, located behind 158 W. Main St.

    For more info: Visit the OC Book Fair site.

  • Becerra and Hilton's plans unclear
    Xavier Becerra, left, and Steve Hilton, right, stand at separate white podiums on a CNN debate stage. Becerra has a medium skin tone and wears thin-framed glasses, a dark suit, white shirt and maroon tie, while Hilton has a light skin tone and a short light beard and wears a navy jacket over an open-collared white shirt.
    From left, gubernatorial candidates Xavier Becerra and Steve Hilton, during CNN’s California Gubernatorial Debate at CNN’s studio in Burbank on Sept. 30, 2026

    Topline:

    In September, Gov. Gavin Newsom unveiled what is likely one of the last large climate announcements of his tenure: California will move forward with linking its decade-old carbon market with a newly formed market in Washington state, aiming to merge it with the market California already shares with Quebec. Newsom said California was “choosing certainty, partnership, and clean energy” amid a stream of federal climate policy rollbacks. As Newsom leaves his post, many policy and climate experts say the adjustments to the program put California’s climate goals further out of reach. The program provides billions of dollars in funding for climate and other programs.

    Why it matters: With little talk of climate policy in the governor's race, Californians are largely left guessing about how Steve Hilton or Xavier Becerra would handle the program or California’s broader climate ambitions. The Becerra campaign did not respond to multiple emailed requests for comment. Hilton told CalMatters he would move to suspend the carbon market — which he called “a disaster of a program” — entirely.

    What's at stake: Whoever wins in November can appoint a handful of new members to the California Air Resources Board, which has to finish writing the linkage rules and will propose the budget that leans on carbon market revenue. The next governor will also help decide how aggressively California leads on climate, after a year of mixed signals about where the program is headed.

    The backstory: Twenty years ago, lawmakers made California the first state to mandate broad cuts in greenhouse gas emissions with AB 32, the landmark carbon emissions reduction law, which authorized the subsequent creation of a market. The law requires the program to be as cost-effective as possible while maximizing benefits to the state’s economy.

    In September, Gov. Gavin Newsom unveiled what is likely one of the last large climate announcements of his tenure: California will move forward with linking its decade-old carbon market with a newly formed market in Washington state, aiming to merge it with the market California already shares with Quebec.

    Newsom said California was “choosing certainty, partnership, and clean energy” amid a stream of federal climate policy rollbacks.

    But the announcement didn’t distract environmental advocates from the sting of a challenging year back home for the so-called “cap-and-invest” program. As Newsom leaves his post, many policy and climate experts say the adjustments to the program put California’s climate goals further out of reach. The program provides billions of dollars in funding for climate and other programs.

    Yet with little talk of climate policy in the governor's race, Californians are largely left guessing about how Steve Hilton or Xavier Becerra would handle the program or California’s broader climate ambitions. The Becerra campaign did not respond to multiple emailed requests for comment. Hilton told CalMatters he would move to suspend the carbon market — which he called “a disaster of a program” — entirely.

    Twenty years ago, lawmakers made California the first state to mandate broad cuts in greenhouse gas emissions with AB 32, the landmark carbon emissions reduction law, which authorized the subsequent creation of a market. The law requires the program to be as cost-effective as possible while maximizing benefits to the state’s economy.

    Whoever wins in November can appoint a handful of new members to the California Air Resources Board, which has to finish writing the linkage rules and will propose the budget that leans on carbon market revenue. The next governor will also help decide how aggressively California leads on climate, after a year of mixed signals about where the program is headed.

    “It's really set up the politics of these issues to get worse and not better over time, and that is the problem that is being tossed like a live grenade into the lap of the next governor,” said Danny Cullenward, an economist who sits on an advisory committee focused on the carbon market.

    A question of climate leadership

    In May, a process to reauthorize the keystone climate program ended with a controversial agreement that the Legislative Analyst’s Office projects will roughly halve annual auction revenue, offering about $2 billion less in funding for priority environmental programs while opening a separate pool of free permits for polluters that pledge to invest in decarbonization, valued at as much as $4 billion.

    Oil companies fought the initial cap-and-invest reauthorization proposal, arguing it would encourage companies to leave the state or further increase fuel prices. The California Air Resources Board, which manages the program, said the increased allowances it eventually approved were meant to balance affordability and economic uncertainty alongside emissions targets. In an email, a board spokesperson said the new incentives would not have any impact on the market’s auction revenue. (The Western States Petroleum Association, which represents refiners in the state, declined an interview for this story.)

    The concern comes as California prepares to elect its next governor and nears its own 2030 target to reduce greenhouse gas emissions 40% below 1990 levels, on its way to zeroing out emissions by 2045.

    “This is not a question anymore of whether or not we'll reach the target. This is a guarantee that we won't,” said Katie Valenzuela, a consultant for Communities for a Better Environment who previously co-chaired an environmental justice committee that advised regulators on the state’s program.

    State officials have long framed cap-and-invest as a backstop, keeping the state on track for its climate targets by ratcheting down the emissions limit even if other programs fall short. Advocates worry the changes will have a chilling effect rather than signal the market’s long-term strength, just as California loses ground to federal rollbacks.

    “It is going to become very difficult for us to say we are a climate leader when we are visibly missing our targets,” Cullenward said.

    Others remain more optimistic. Cap-and-invest is one tool in California’s toolbox, even if this year dulled it. Meredith Fowlie, an economist at the University of California, Berkeley, said the program is not optimal but has done the basics of its job: sending a price signal to drive down emissions while raising revenues for important programs.

    Linking with Washington’s market will strengthen California’s program overall, air board Chair Lauren Sanchez wrote to Newsom in September. In addition to creating a larger market with more credits available to industries in both states, the link is expected to raise carbon credit prices in California, where recent auctions have yielded prices at state minimums. A connected market could also lower prices in Washington, making the state’s more stringent program less lucrative. Low prices reduce the program’s revenues and starve polluting industries’ incentive to invest in lowering emissions.

    Regulators have not yet established a rulemaking timeline for the linkage process, a spokesperson for the board told CalMatters, but the board expects the joint market to begin operating next year.

    Chloe Ames, policy adviser at NextGen Policy, an organization founded by former gubernatorial candidate Tom Steyer, called linkage a strong step forward. The group is disappointed by the other changes made to cap-and-invest this year, she said, and will keep urging the legislature to adjust the industry incentives and California’s next governor to take climate seriously.

    “It's been more challenging for us to say that we're a climate leader, and that's why we need to step up,” Ames said. “In this work, what are you going to do other than to be hopeful?”

    Kicking the can

    Since the market began, revenue has funded a wide range of priorities, including job training, clean energy and affordable housing. Managing those investments, alongside costs to Californians and emissions cuts, has been a balancing act — one the next governor will inherit, Fowlie said. “Some of those objectives are potentially in tension,” she said. “A sole focus on designing the program to meet our greenhouse gas reductions misses this really important larger picture that this program is about more than that.”

    The legislature approved the program’s reauthorization and the state’s air regulators lay out its rules, but a governor has influence over how that process plays out and can exert his own priorities, Cullenward said.

    Beyond the carbon market, governors have wider latitude: Newsom has used his executive authority on wildfires, water shortages and clean energy.

    In the governor’s race, neither candidate has centered climate in his campaign. In their one debate, both candidates steered a question about climate change’s impacts toward affordability concerns, offering little detail on the actual climate policies they favor.

    “I think it's fair to say that climate probably isn't the top priority of either one,” said Barry Vesser, the chief operating officer at the Climate Center, a California environmental group that opposed this year’s changes to the carbon market.

    Becerra’s campaign website emphasizes affordability in climate policy. He has faced criticism for defending Chevron and for accepting large oil and gas donations. As attorney general, though, he defended the state’s carbon program in court, arguing that “carbon pollution knows no borders” and promising that California would fight the first Trump administration’s rollbacks.

    Hilton has rallied against California’s Democratic establishment, and he told CalMatters he would aim to de-bloat the bureaucracy guiding the state’s climate policies. He likened the market’s recent programmatic changes to “rearranging deck chairs on the Titanic.” Hilton, who considers himself an environmentalist, has argued for redirecting resources from current climate programs and wildfire mitigation toward management of the state’s natural lands. He also wants to rework renewable incentives to create “a level playing field” for technologies like rooftop solar, hydropower and geothermal energy. His strategy, he claims, will reduce economic burdens for Californians while exceeding the state’s climate targets.

    The relative lack of attention to climate policy is a missed opportunity, according to Valenzuela and Vesser. They see a chance for the next governor to more directly and publicly connect climate programs to affordability, a key concern for likely voters and an issue on which Becerra and Hilton agree.

    Ultimately, the race’s rhetoric has advocates like Valenzuela “freaked out.” She points to a “huge chasm” between present reality and the policies that would put California on the right track. The state has little time left for the aggressive action its climate ambitions require, she and other advocates say, and it’s time to start dealing in reality.

    “There's not many more governors left we can kick the can to before that bill comes due,” Cullenward said.

    This article was originally published on CalMatters and was republished under the Creative Commons Attribution-NonCommercial-NoDerivatives license.