Science
Some California landfills are on fire and leaking methane. Newly proposed rules could make them safer
A vast canyon of buried garbage has been smoldering inside a landfill in the Santa Clarita Valley, inducing geysers of liquid waste onto the surface and noxious fumes into the air.
In the Inland Empire, several fires have broken out on the surface of another landfill. In the San Fernando Valley, an elementary school has occasionally canceled recess due to toxic gases emanating from rain-soaked, rotting garbage from a nearby landfill. And, in the San Francisco Bay Area, burrowing rodents may be digging into entombed trash at a landfill-turned-park, unloosing explosive levels of methane.
These are just a few of the treacherous episodes that have recently transpired at landfills in California, subjecting the state’s waste management industry to growing scrutiny by residents and regulators.
Landfill emissions — produced by decaying food, paper and other organic waste — are a major source of planet-warming greenhouse gases and harmful air pollution statewide. But mismanagement, aging equipment and inadequate oversight have worsened this pollution in recent years, according to environmental regulators and policy experts.
This week, the California Air Resources Board will vote on adopting a new slate of requirements to better identify and more quickly respond to methane leaks and disastrous underground fires at large landfills statewide.
The proposal calls for using satellites, drones and other new technologies to more comprehensively investigate methane leaks. It also would require landfill operators to take corrective action within a few days of finding methane leaks or detecting elevated temperatures within their pollution control systems.
In recent years, state regulators have pinpointed at least two landfills in Southern California experiencing “rare” underground landfill fires — largely uncontrollable disasters that have burned troves of buried garbage and released toxic fumes into the air. More recently, a new state satellite program has detected 17 methane plumes from nine landfills between July and October, potentially leaking the flammable gas into unwanted areas and contributing to climate change.
Proponents of the proposed rule say the added oversight could help reduce California’s second-largest source of methane, a potent greenhouse gas that warms the atmosphere much more than carbon dioxide. It could also bring relief to hundreds of thousands of people who live nearby landfills and may be exposed to toxic pollutants like hydrogen sulfide or benzene.
“Curbing methane emissions is a relatively quick and cost-effective way to reduce the greenhouse pollution that’s wreaking havoc with our climate,” said Bill Magavern, policy director at the Coalition for Clean Air. “But [we’ve] also been involved in updating and strengthening the rule because we’re seeing the community impacts of leaking landfills, particularly at places like Chiquita Canyon, where we have a landfill fire that is making people in the community sick.”
Nearly 200 landfills statewide would be subject to the proposed requirements — 48 are privately owned and 140 are government-owned.
Many landfill operators oppose the rule, saying the new requirements would saddle the industry with an untenable workload and millions of dollars each year in added costs. These costs could be passed on to residents, whose garbage fees have already risen significantly in recent years.
Sacramento County officials, who operate the Kiefer Landfill, said the proposed protocols were not feasible.
“As a public landfill, Kiefer cannot quickly adapt to regulatory shifts of this magnitude, and these increased costs would ultimately burden the community it serves,” Sacramento County officials wrote in a Nov. 10 letter to the state Air Resources Board.
The vast majority of landfills are already required to monitor for leaks and operate a gas collection system — a network of wells that extend deep into the layers of buried waste to capture and destroy methane.
A hot mess
Chiquita Canyon Landfill in Castaic has become the poster child for the issues plaguing California’s waste management system.
A blistering-hot chemical reaction began inside the landfill’s main canyon in May 2022, roasting garbage in a roughly 30-acre area.
Starting in April 2023, residents of Castaic and nearby Val Verde began to take notice. They called in thousands of odor complaints to the South Coast Air Quality Management District, with many citing headaches, nausea, nosebleeds and difficulty breathing.
Later that year, state regulators learned that the landfill’s temperatures had risen above 200 degrees, melting plastic pipes used to collect landfill gases. An air district inspector also witnessed geysers of liquid waste bursting onto the surface and white smoke venting from large cracks spreading across the reaction area.
Air sampling found elevated levels of lung-aggravating sulfur pollutants and cancer-causing benzene. Air samples in 2023 detected benzene concentrations more than eight times higher than the state’s short-term health limit at Hasley Canyon Park, which abuts Live Oak Elementary School, alarming local parents.
“I personally have transferred my children to different schools further away,” said Jennifer Elkins, a Val Verde resident whose children attended Live Oak. “I spend three hours a day driving my kids to and from school. The commute has been a sacrifice, but it’s also been well worth it, because I know my children are breathing cleaner air, and I have seen their health improve.”
The landfill, owned by Texas-based Waste Connections, installed new heat-resistant equipment to extract liquid waste in an attempt to reduce broiling temperatures. It also installed a large covering over the affected area to suppress odors. It permanently closed and ceased accepting waste this year.
Still, the reaction area has tripled in size and could consume the entire 160-acre canyon for many more years. During other underground landfill fires, elevated temperatures have persisted for more than a decade.
The issue is, once these broiling temperatures start consuming landfill waste, there’s little that landfill operators can do to snuff them out.
The fumes from Chiquita Canyon have pushed some longtime residents to consider moving. After more than 25 years in Val Verde, Abigail DeSesa is contemplating starting anew somewhere else.
“This is our life’s investment — our forever home that we were building for retirement and on the verge of paying off,” DeSesa said. “And we may have to start over.”
“I don’t know that I can outlast it,” DeSesa added.
Chiquita Canyon is not alone.
Earlier this year, the South Coast air district learned about another fiery chemical reaction brewing inside El Sobrante Landfill in Corona. In August, Waste Management, the landfill’s owner and operator, acknowledged there was a two-acre “area of concern” where landfill staff had observed temperatures climbing above 200 degrees. Riverside County inspectors also found several fires had ignited on the landfill’s surface in recent years, according to public records.
Environmental advocates fear that many more landfills may be on the precipice of these largely unmanageable disasters.
According to an analysis by California Communities Against Toxics, there are 18 landfills in California that have had prolonged heat signatures detected by NASA’s Fire Information for Resource Management System, an online tool using satellite instruments to detect fires and thermal anomalies.
At least 11 of these landfills requested and received permission from either federal or local environmental regulators to continue operating with higher temperatures than currently allowed, according to public records obtained by the environmental organization.
These regulatory exemptions are part of the problem, said Jane Williams, the group’s executive director.
“We have 11 landfills across California that have been granted waivers by the government to basically ‘hot rod’ the landfill,” Williams said. “We would really like EPA and state agencies to stop granting landfill waivers. It’s a permission slip to speed in a school zone.”
Under newly proposed revisions to state rules, operators must be more transparent in disclosing the temperatures in their gas collection systems. If operators detect elevated temperatures, they must take action to minimize the amount of oxygen in the landfill.
While these rule changes might be coming too late to fix the issues near Chiquita Canyon, locals hope it will help others who live in the orbit of the nearly 200 other large landfills in California that could be subject to these rules.
“While there’s still a fight here to try to address the concerns at Chiquita Canyon Landfill, we know that there’s an opportunity to really prevent this kind of disaster from happening anywhere else in our state,” said Assemblymember Pilar Schiavo.
Dangerous leaks
Meanwhile, many other landfills are releasing unsafe amounts of methane, an odorless gas produced by bacteria that break down organic waste.
These emissions present two critical issues.
First, methane is a powerful greenhouse gas — capable of warming the atmosphere 80 times more than the same amount of carbon dioxide over 20 years. Following California’s large dairy and livestock operations, landfills emit the second-most methane statewide.
Second, methane is the primary constituent in natural gas. It can ignite or explode at certain concentrations, presenting a serious safety risk in the event of uncontrolled releases. Several times over the last few years, regulators have detected potentially explosive concentrations in the air and shallow soil near several landfills.
Under current landfill regulations, operators are required to monitor for excessive methane leaks four times a year. Many operators hire contractors to walk across accessible portions of the landfill with a handheld leak-monitoring device, an approach that some environmental advocates say is unreliable.
In addition, some areas of the landfill are not screened for methane leaks if operators consider them to be unsafe to walk across, due to, for example, steep hills or ongoing construction activities.
“Landfills have to monitor surface emissions, but they do that in a very inefficient way, using outdated technology,” Magavern said.
Starting this past summer, California has partnered with the nonprofit organization Carbon Mapper to use satellites to detect methane leaks, and already has found 17 coming from landfills. In one case, researchers saw a large methane plume appear to emanate from Newby Island Landfill in San José and drift into a nearby residential neighborhood.
Although the state has notified these landfill operators, it currently cannot require them to repair leaks detected via satellite. That would change under the proposed amendments to the state’s landfill regulations. Operators would also have to use state-approved technology to routinely scan portions of their landfills they deem inaccessible.
The proposed amendments seek to prevent the most common causes of methane emissions. A series of surveys of landfill operators found 43% of leaks in recent years were caused by one or more of a facility’s gas collection wells being offline at the time.
The new rules would require that such wells can only be offline for up to five days at a time for repairs. Operators would also be required to install gas collection systems within six months of when garbage is first placed in a new part of a landfill — rather than the 18-month time frame currently allowed.
In addition, landfills would be forced to take actions to fix a leak within three days of detection, rather than 10 days. In theory, that should help reduce the risk of leaks from things like cracks in landfill covers (typically a layer of soil or plastic covering) and damaged components of gas collection systems — two other major sources of leaks that landfill operators have reported.
The amended landfill rules could collectively cost private companies and local governments $12 million annually.
Some say that’s well worth the cost.
A contingent of residents who live near Chiquita Canyon Landfill are flying to Sacramento to attend the state Air Resources Board meeting. They are expected to testify on how the fire and landfill emissions have unraveled the fabric of the semi-rural community.
Elkins, the Val Verde resident, appreciated the area’s natural beauty — picturesque hillsides, wildlife and opportunities for stargazing without bright city lights. However, now her family hardly spends any time outdoors due to the noxious odors.
Some of her neighbors have moved away, but Elkins and many other longtime locals cannot, no matter how they fear for their health and safety. “The homes are not selling,” she said. “Other homes sit vacant, and community members are paying two mortgages just to get away. And for many of us, it would be financial suicide to move away and start over somewhere new.”
Science
Leaked memo reveals California debated cutting wildfire soil testing before disaster chief’s exit
California Gov. Gavin Newsom’s disaster chief quietly retired in late December amid criticism over the state’s indecisive stance on whether soil testing was necessary to protect survivors of the Eaton and Palisades fires.
One year ago, Nancy Ward, then the director of the California Governor’s Office of Emergency Services (Cal OES), petitioned the Federal Emergency Management Agency to spearhead the cleanup of toxic ash and fire debris cloaking more than 12,000 homes across Los Angeles County.
Although Ward’s decision ensured the federal government would assume the bulk of disaster costs, it came with a major trade off. FEMA was unwilling to pay for soil sampling to confirm these homes weren’t still heavily contaminated with toxic substances after the cleanup — testing that California state agencies have typically done following similar fires in the past.
Following intense backlash from fire survivors and California lawmakers, Ward pleaded with FEMA to reconsider its soil-testing stance, writing in a Feb. 19 letter that it is “critical to protect public health” and “ensure that survivors can safely return to their homes.” Her request was denied.
However, in October, Cal OES — under Ward’s leadership — privately considered discontinuing state funding for soil testing in the aftermath of future wildfires, according to a confidential, internal draft memo obtained by the Los Angeles Times.
The Times requested an interview with Ward, and sent questions to her office asking about her initial decision to forgo soil testing and for clarity on the future of state’s fire recovery policy. Ward declined the request; The Times later published an article on Dec. 29 about allegations that federal contractors illegally dumped toxic ash and misused contaminated soil in breach of state policy.
Ward, who served as Cal OES director for three years, retired on Dec. 30; her deputy director, Christina Curry, stepped into the role as the interim chief. Ward also did not respond to several requests for comment for this article.
Ward was the first woman to serve as Cal OES director. She had also previously served as a FEMA regional administrator, overseeing federal disaster response in the Southwest and Pacific Islands from 2006 to 2014.
A Cal OES spokesperson said Ward’s retirement had been planned well in advance.
“Director Nancy Ward has been a steady hand and a compassionate leader through some of California’s largest disasters,” the spokesperson said. “Her decades of service have made our state stronger, safer, and more resilient. The Governor is deeply grateful for her dedication and wishes her the very best in retirement.”
The internal memo obtained by The Times was written by Ward’s assistant director, and titled: “Should the state continue to pay for soil testing as part of Private Property Debris Removal (PPDR) programs? ”
It laid out three possible answers: The state could keep funding soil testing after future wildfires; the state could defer soil testing decisions to the affected counties with the possibility of reimbursing them; or the state could stop paying for soil testing entirely.
A Cal OES spokesperson said the memo was only a draft and did not represent a policy change. “The state’s position on soil testing remains unchanged,” the spokesperson said. “California is committed to advocating for the safe, timely removal of wildfire debris. Protecting the public health and well-being of impacted communities remains the state’s foremost priority.”
The primary reason for soil testing is to prevent harmful exposures to toxic metals, such as brain-damaging lead or cancer-causing arsenic. Since 2007, comprehensive soil testing has been conducted after 64 wildfire cleanups in California, according to the memo. When soil contamination still exceeded state benchmarks after the initial cleanup, the state government redeployed cleanup workers to remove more dirt and then retest the properties.
This approach, the memo said, was critical in identifying harmful substances that “pose exposure hazards via ingestion, inhalation of dust, or through garden/food production.” Soil testing “helps ensure the safety” of children, seniors, pregnant women and people with health issues who are “more vulnerable to soilborne toxins.”
“The State has a long precedent of conducting or paying for soil testing,” the Cal OES assistant director wrote in the memo. “Pivoting from this would be a significant policy change.”
The memo cites a report from CalRecycle, the agency that has historically carried out state-led fire cleanups, that stresses the importance of the current practice to public health.
“Soil contamination after a wildfire is an invisible threat,” wrote a CalRecycle official. “If not properly cleaned and remediated in a methodical way, property owners may encounter additional hurdles during the rebuilding process and suffer additional trauma.”
“Soil sampling,” the official adds, “is the metric by which Recyclable demonstrates that debris removal operations have successfully remediated the post-disaster threat to public health and the environment.”
However, such soil testing and additional cleanup prolongs the cleanup timeline and can make it more expensive. The memo cites cost estimates from CalRecycle which show that soil testing and additional cleanup work usually costs some $4,000 to $6,000 per parcel, representing 3% to 6% of overall debris removal costs.
The state cost projections align with those made by independent environmental experts. Andrews Whelton, a Purdue University professor who researches natural disasters, estimated that soil testing and further remediation for the Eaton and Palisades fire would cost between $40 million to $70 million.
All told, the CalRecycle report states the usual soil-testing process has been a “relatively low-cost step” to safeguard public health.
Further, although soil testing may add some cost, when it’s taken as a proactive measure, it can save money down the road.
Forgoing soil testing and evidence-backed remediation can generate uncertainty about toxic contamination, which in turn could lower the value of homes in Altadena and Pacific Palisades, Whelton said. What’s more, the property owner may be liable for soil contamination if they fail to disclose environmental risks when selling or leasing.
The internal CalOES memo alludes to this give and take: “Funds saved initially by skipping testing may be outweighed by later unseen costs, for example, reinvesting in remediation, addressing community complaints, litigation, or cleanup failure.”
The U.S. Army Corps of Engineers has fielded over 1,100 complaints filed by property owners affected by the Eaton and Palisades fires — over 20% of which were related to the quality of work. According to internal reports obtained by The Times, federal cleanup repeatedly deviated from cleanup protocols, likely spreading contamination in the process.
Since then, FEMA officials have backed down from their hard-line stance against paying for post-fire soil testing in California in an attempt to shore up public confidence in the federal cleanup.
The U.S. Environmental Protection Agency announced this week that FEMA will conduct a limited lead-testing program in the Eaton fire burn scar that is intended to “confirm the effectiveness of cleanup methods,” according to an EPA spokesperson. The initiative has already come under the scrutiny of environmental experts who say it lacks the rigor of California’s soil testing regimen.
It remains unclear if California will continue to implement soil-testing safeguards that made the state a national leader in fire recovery. Though state officials say these will remain unchanged, there is no legal mandate to follow these procedures.
The internal CalOES memo circulated under Ward’s leadership has only added to the cloud of uncertainty.
One thing is clear: It’s a moot point for survivors of the Eaton and Palisades fire.
As state and federal officials debated the value of soil testing, most Altadena and Pacific Palisades residents have been left to investigate the extent of environmental fallout on their own.
Science
Flu cases surging in California as officials warn of powerful virus strain
California officials are issuing warnings about a new flu strain that is increasing flu-related cases and hospitalizations statewide, with public health experts across the nation echoing the alerts.
A newly emerged influenza A strain, H3N2 subclade K, is already wreaking havoc globally and is affecting hospitals and clinics in California, the state’s Department of Public Health announced Tuesday. The agency described the seasonal flu activity as “elevated” in the state; data show that flu test positivity rates, which measure the percentage of patients who come in with flu symptoms and actually test positive for influenza, have been rising in recent weeks. However, they are still relatively low compared to last year’s flu season.
“Flu started to rise, in earnest, by mid-December and rates are still up,” said Dr. Elizabeth Hudson, regional physician chief of infectious diseases for Kaiser Permanente. “We are hoping to see some plateauing in the next few weeks, but there’s some delay in data due to recent holidays, so it will become clearer in the next week or so.”
Hudson said most flu-related cases are being treated without the need for hospital admittance, “but those who are older or at higher risk for complications from the flu are the ones we’re mostly seeing admitted.”
According to data from the public health agency, there’s a high rate of positive flu cases in Central California and the Bay Area and a moderate rate around Sacramento and Southern California. In the northern part of the state where it’s more rural, the rate of flu cases is currently low, according to the agency’s website.
In Los Angeles County, recent data from the health department show that between the end of last year and the start of 2026, there were 162 flu-related hospitalizations and an additional 18 cases in which patients were admitted for intensive care.
Nationally, this flu season has been far worse than in California. According to the Centers for Disease Control and Prevention, this flu season has led to the highest number of cases in the U.S. in more than 30 years. The agency estimates that there have been at least 15 million infections in the U.S., with 180,000 hospitalizations and 7,400 deaths, since late fall. At least two of those who died have been children, said Yvonne Maldonado, the Taube professor of global health and infectious disease at Stanford Medicine, in a news release. The state’s Department of Public Health confirmed that those pediatric flu-associated deaths occurred in California.
Last year, infectious disease experts predicted this flu season would be particularly bad for high-risk groups, specifically children, due to a decline in flu vaccination rates and a “souped-up mutant” flu strain, Dr. Peter Chin-Hong, an infectious diseases expert at UC San Francisco, told The Times.
Last year’s flu season was particularly bad, “but little did we know what was in store for us this year,” said Dr. Neha Nanda, medical director of antimicrobial stewardship with Keck Medicine of USC. Nanda said she is seeing an early upward trend in positive influenza cases this season compared with previous years, though it isn’t quite on par with last year, or from the years preceding COVID — at least in California.
Dr. Sam Torbati, co-chair and medical director of Cedars-Sinai Medical Center’s emergency department, said that around the second week of December he saw a lot of patients coming into his department with flu-related illnesses, part of a surge in hospitalizations that was seen throughout the county.
He said he doesn’t recall “seeing this many patients becoming this ill.”
“It’s very early in the flu season and may get much worse,” Torbati said.
Experts believe the strain has mutated to “more likely evade” immunity from the current vaccine. That’s because the strain emerged toward the end of the summer, long after health officials had already determined the formula for the flu vaccine.
“Current seasonal flu vaccines remain effective at reducing severe illness and hospitalization, including the currently circulating viruses,” said Dr. Erica Pan, state public health officer.
Even though the flu shot might not keep you from succumbing to the illness, “it lessens your odds of having a severe case, keeps you out of the hospital and shortens the duration of the illness,” said Dr. Michelle Barron, senior medical director of infection prevention and control for UCHealth, in a report by the Assn. of American Medical Colleges.
Officials are urging the public, especially those at higher risk for severe flu complications such as the very young and older populations, to get vaccinated or take immediate antiviral treatment, such as Tamiflu.
The flu can be very serious with symptoms — fatigue, fever, cough and body aches — that feel like you got “hit by a Mack truck,” Hudson said.
For children and other high-risk individuals, the symptoms can be more severe.
“Children can develop dehydration [or] pneumonia, and more severe cases of flu in kids can lead to inflammation of the brain and heart,” Hudson said.
The problem has not been limited to the U.S. The influenza A strain, H3N2 subclade K, has caused severe flu seasons in Australia, Japan, the United Kingdom and other parts of Europe and Asia.
Science
Video: Four Astronauts Splash Down on Earth After Early Return
new video loaded: Four Astronauts Splash Down on Earth After Early Return
transcript
transcript
Four Astronauts Splash Down on Earth After Early Return
Two American astronauts and others from Japan and Russia landed in the Pacific Ocean after an early journey home from the International Space Station because one of them was ill.
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You’re getting a live look inside the cabin right now. That’s Crew-11 preparing for their re-entry period. Splashdown of Crew-11. After 167 days in space, Dragon and NASA astronauts Zena Cardman and Mike Fincke, Kimiya Yui of JAXA and Roscosmos cosmonaut Oleg Platonov are back on Earth. The SpaceX recovery ship and team has been waiting for Dragon splashdown, and they will now begin making their way to the splashdown location. And we are seeing motion for Dragon. They are pulling it to the egress platform. And it looks like our first crew member out of the spacecraft is NASA astronaut Mike Fincke.
By Axel Boada
January 15, 2026
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