Science
How Zone Zero, designed to protect California homes from wildfire, became plagued with controversy and delays
Late last month, California fire officials made a courtesy call to Los Angeles.
The state’s proposed Zone Zero regulations that would force homeowners to create an ember-resistant zone around their houses — initially planned to take effect nearly three years ago — had caused an uproar in the region. It was time for damage control.
Officials from both Cal Fire and the state’s Board of Forestry and Fire Protection visited Brentwood, the epicenter of the outrage, and Altadena, where homeowners are trying to figure out how best to rebuild, but did little to assuage the concerns of the Zone Zero proposals’ most vocal critics.
The two groups took turns pointing out homes that seemed to support their claims. The copious, contradictory anecdotal evidence provided no consensus for a path forward. For example, in the Eaton burn area, officials showed residents a home they claimed was spared thanks to its removal of vegetation near the home, but residents noted a home across the street with plenty of plants that also survived.
It was an example of what’s become an interminable debate about what should be required of homeowners in L.A.’s fire-prone areas to limit the destruction of future conflagrations.
Initial attempts by the board to create Zone Zero regulations, as required by a 2020 law, quietly fizzled out after fire officials and experts struggled to agree on how to navigate a lack of authoritative evidence for what strategies actually help protect a home — and what was reasonable to ask of residents.
The Jan. 1, 2023, deadline to create the regulations came and went with little fanfare. A month after the January fires, however, Gov. Gavin Newsom signed an executive order resurrecting the efforts and ordering the board to finish the regulations by the end of the year. As the board attempted to restart and speed-run the previous efforts through a series of public meetings, many Californians grew alarmed. They felt the draft Zone Zero requirements — which would be the strictest statewide defensible space rules on the books — were a step too far.
“The science tells us it doesn’t make sense, but they’re ignoring it because they have to come up with something,” said Thelma Waxman, president of the Brentwood Homeowners Assn.,who is working to certify neighborhoods in her area as fire safe. “If I’m going to go to my members and say, ‘OK, you need to spend $5,000 doing one thing to protect your home,’ it’s not going to be to remove hydrated vegetation.”
Instead, she wishes the state would focus on home-hardening, which has much more compelling research to support its effectiveness.
Tony Andersen, the board’s executive officer, stressed that his team wants to keep requirements evidence-based and reasonable for homeowners. “We’re listening; we’re learning,” he said.
Zone Zero is one of the many fire safety regulations tied to the fire hazard severity maps created by Cal Fire, which, while imperfect, attempt to identify the areas in California likely to see intense wildfire.
Since 2008, all new homes in California in areas that those maps determined have very high fire hazard are required to have multi-paned or fire-resistant windows that are less likely to shatter in extreme heat, mesh coverings on all vents so flying embers can’t sneak inside and ignition-resistant roofing and siding.
The state’s defensible space regulations break down the areas surrounding a home into multiple zones. Zone Two is within 100 feet of the home; in that space, homeowners must remove dead vegetation, keep grass under 4 inches and ensure that there is at least 10 feet between trees. Zone One is within 30 feet of a structure; here, residents cannot store firewood. Zone Zero, within 5 feet, is supposed to be “ember-resistant” — essentially meaning that there cannot be anything that might ignite should embers land within it.
The problem is, it’s unclear how to best create an “ember-resistant” zone. For starters, there’s just not a lot of scientific evidence demonstrating which techniques effectively limit ignitions. That’s especially true for the most controversial Zone Zero proposal: removing healthy plants.
“We have very few publications looking at home losses and vegetation patterns in Zone Zero,” said Max Moritz, a wildfire-dynamics researcher with UC Santa Barbara and the UC Cooperative Extension program.
Further complicating the problem, the board also needs to consider what is reasonable to ask of homeowners. Critics of the current proposal point out that while wooden fences and outbuildings are banned, wooden decks and doors are still fine — not because they cannot burn, but because asking residents to replace them is too big of a financial burden and they are, arguably, out of the purview of “defensible space.” And while many in the L.A. area argue they should be allowed to keep plants if they’re well-watered, the board cannot single-handedly dictate water usage for ornamental vegetation across the state.
To deal with the head-spinning complexity, the state started with a small working group in 2021 that included Cal Fire staff, local fire departments and scientists. The working group slowly grew to include more local leaders and came close to finalizing the rules with the board as it neared the Legislature’s Jan. 1, 2023, deadline. But as the parties got stuck on the final details, the deadline came and went. Zone Zero slowly fell off the meeting schedules and agendas and for two years, essentially nothing was done.
Then, L.A. burned.
In February 2025, Newsom signed an executive order pushing the board to finish the regulations by Dec. 31. As the board began hosting public hearings on the regulations, shock and frustration had set in among Californians.
To add insult to injury, Newsom’s executive order also pushed Cal Fire to release new hazard maps that the Legislature had also mandated. When the agency did that in the spring, many Californians were distraught to learn that the maps added over 300,000 acres — mostly in developed areas — into the classifications where Zone Zero will apply.
At a (now somewhat infamous) Zone Zero meeting at the Pasadena Convention Center in September — the only one to take place in Southern California — public comments stretched on for over five hours. They included several speakers more accustomed to receiving public comments than making them: The mayor of Agoura Hills, representatives for L.A. City Council members and the chair of L.A.’s Community Forest Advisory Committee.
Alongside marathon public meetings, the board received more than 4,000 letters on the regulations.
In a September report to L.A.’s City Council, the Los Angeles Fire Department and the city’s forestry committee chastised the board for failing to consult the city during the process and only holding its Pasadena meeting “after persistent pressure from local advocates … six months into the rulemaking process.” It also pointed to a 2025 study that found many home-hardening techniques play a much more significant role in protecting homes than defensible space.
Most of the Zone Zero proposals have generally received agreement or at least acceptance among the public: No wooden mulch, no wooden fence that attaches to the house, no dead vegetation and only outbuildings made of noncombustible materials. But two issues quickly took center stage in the discourse: trees and plants.
Residents have become increasingly concerned with the prospect of cutting down their trees after the working group began discussing how to handle them. However, the current proposals would not require residents to remove trees.
“It’s pretty much settled,” Andersen said. Well-maintained trees will be allowed in Zone Zero; however, what a well-maintained tree looks like “still needs to be discussed.”
What to do about vegetation like shrubs, plants and grasses within the first 5 feet of homes has proved more vexing.
Some fire officials and experts argue residents should remove all vegetation in the zone, citing examples of homes burning after plants ignited. Others say the board should continue to allow well-watered vegetation in Zone Zero, pointing to counterexamples where plants seemed to block embers from reaching a home or the water stored within them seemed to reduce the intensity of a burn.
“A hydrated plant is absorbing radiant heat up until the point of ignition, and then it’s part of the progression of the fire,” said Moritz. The question is, throughout a wildly complex range of fire scenarios, when exactly is that point reached?
In October, the advisory committee crafting the regulations took a step back from its proposal to require the removal of all living vegetation in Zone Zero and signaled it would consider allowing well-maintained plants.
As the committee remains stuck in the weeds, it’s looking more and more likely that the board will miss its deadline (for the second time).
“It’s more important that we get this right rather than have a hard timeline,” Andersen said.
Science
After rash of overdose deaths, L.A. banned sales of kratom. Some say they lost lifeline for pain and opioid withdrawal
Nearly four months ago, Los Angeles County banned the sale of kratom, as well as 7-OH, the synthetic version of the alkaloid that is its active ingredient. The idea was to put an end to what at the time seemed like a rash of overdose deaths related to the drug.
It’s too soon to tell whether kratom-related deaths have dissipated as a result — or, really, whether there was ever actually an epidemic to begin with. But many L.A. residents had become reliant on kratom as something of a panacea for debilitating pain and opioid withdrawal symptoms, and the new rules have made it harder for them to find what they say has been a lifesaving drug.
Robert Wallace started using kratom a few years ago for his knees. For decades he had been in pain, which he says stems from his days as a physical education teacher for the Glendale Unified School District between 1989 and 1998, when he and his students primarily exercised on asphalt.
In 2004, he had arthroscopic surgery on his right knee, followed by varicose vein surgery on both legs. Over the next couple of decades, he saw pain-management specialists regularly. But the primary outcome was a growing dependence on opioid-based painkillers. “I found myself seeking doctors who would prescribe it,” he said.
He leaned on opioids when he could get them and alcohol when he couldn’t, resulting in a strain on his marriage.
When Wallace was scheduled for his first knee replacement in 2021 (he had his other knee replaced a few years later), his brother recommended he take kratom for the post-surgery pain.
It seemed to work: Wallace said he takes a quarter of a teaspoon of powdered kratom twice a day, and it lets him take charge of managing his pain without prescription painkillers and eases harsh opiate-withdrawal symptoms.
He’s one of many Angelenos frustrated by recent efforts by the county health department to limit access to the drug. “Kratom has impacted my life in only positive ways,” Wallace told The Times.
For now, Wallace is still able to get his kratom powder, called Red Bali, by ordering from a company in Florida.
However, advocates say that the county crackdown on kratom could significantly affect the ability of many Angelenos to access what they say is an affordable, safer alternative to prescription painkillers.
Kratom comes from the leaves of a tree native to Southeast Asia called Mitragyna speciosa. It has been used for hundreds of years to treat chronic pain, coughing and diarrhea as well as to boost energy — in low doses, kratom appears to act as a stimulant, though in higher doses, it can have effects more like opioids.
Though advocates note that kratom has been used in the U.S. for more than 50 years for all sorts of health applications, there is limited research that suggests kratom could have therapeutic value, and there is no scientific consensus.
Then there’s 7-OH, or 7-Hydroxymitragynine, a synthetic alkaloid derived from kratom that has similar effects and has been on the U.S. market for only about three years. However, because of its ability to bind to opioid receptors in the body, it has a higher potential for abuse than kratom.
Public health officials and advocates are divided on kratom. Some say it should be heavily regulated — and 7-OH banned altogether — while others say both should be accessible, as long as there are age limitations and proper labeling, such as with alcohol or cannabis.
In the U.S., kratom and 7-OH can be found in all sorts of forms, including powder, capsules and liquids — though it depends on exactly where you are in the country. Though the Food and Drug Administration has recommended that 7-OH be included as a Schedule 1 controlled substance under the Controlled Substances Act, that hasn’t been made official. And the plant itself remains unscheduled on the federal level.
That has left states, counties and cities to decide how to regulate the substances.
California failed to approve an Assembly bill in 2024 that would have required kratom products to be registered with the state, have labeling and warnings, and be prohibited from being sold to anyone younger than 21.
It would also have banned products containing synthetic versions of kratom alkaloids. The state Legislature is now considering another bill that basically does the same without banning 7-OH — while also limiting the amount of synthetic alkaloids in kratom and 7-OH products sold in the state.
“Until kratom and its pharmacologically active key ingredients mitragynine and 7-OH are approved for use, they will remain classified as adulterants in drugs, dietary supplements and foods,” a California Department of Public Health spokesperson previously told The Times.
On Tuesday, California Gov. Gavin Newsom announced that the state’s efforts to crack down on kratom products has resulted in the removal of more than 3,300 kratom and 7-OH products from retail stores. According to a news release from the governor’s office, there has been a 95% compliance rate from businesses in removing the products.
(Los Angeles Times photo illustration; source photos by Getty Images)
Newsom has equated these actions to the state’s efforts in 2024 to quash the sale of hemp products containing cannabinoids such as THC. Under emergency state regulations two years ago, California banned these specific hemp products and agents with the state Department of Alcoholic Beverage Control seized thousands of products statewide.
Since the beginning of 2026, there have been no reported violations of the ban on sales of such products.
“We’ve shown with illegal hemp products that when the state sets clear expectations and partners with businesses, compliance follows,” Newsom said in a statement. “This effort builds on that model — education first, enforcement where necessary — to protect Californians.”
Despite the state’s actions, the Los Angeles County Board of Supervisors is still considering whether to regulate kratom, or ban it altogether.
The county Public Health Department’s decision to ban the sale of kratom didn’t come out of nowhere. As Maral Farsi, deputy director of the California Department of Public Health, noted during a Feb. 18 state Senate hearing, the agency “identified 362 kratom-related overdose deaths in California between 2019 and 2023, with a steady increase from 38 in 2019 up to 92 in 2023.”
However, some experts say those numbers aren’t as clear-cut as they seem.
For example, a Los Angeles Times investigation found that in a number of recent L.A. County deaths that were initially thought to be caused by kratom or 7-OH, there wasn’t enough evidence to say those drugs alone caused the deaths; it might be the case that the danger is in mixing them with other substances.
Meanwhile, the actual application of this new policy seems to be piecemeal at best.
The county Public Health Department told The Times it conducted 2,696 kratom-related inspections between Nov. 10 and Jan. 27, and found 352 locations selling kratom products. The health department said the majority stopped selling kratom after those inspections; there were nine locations that ignored the warnings, and in those cases, inspectors impounded their kratom products.
But the reality is that people who need kratom will buy it on the black market, drive far enough so they get to where it’s sold legally or, like Wallace, order it online from a different state.
For now, retailers who sell kratom products are simply carrying on until they’re investigated by county health inspectors.
Ari Agalopol, a decorated pianist and piano teacher, saw her performances and classes abruptly come to a halt in 2012 after a car accident resulted in severe spinal and knee injuries.
“I tried my best to do traditional acupuncture, physical therapy and hydrocortisone shots in my spine and everything,” she said. “Finally, after nothing was working, I relegated myself to being a pain-management patient.”
She was prescribed oxycodone, and while on the medication, battled depression, anhedonia and suicidal ideation. She felt as though she were in a fog when taking oxycodone, and when it ran out, ”the pain would rear its ugly head.” Agalopol struggled to get out of bed daily and could manage teaching only five students a week.
Then, looking for alternatives to opioids, she found a Reddit thread in which people were talking up the benefits of kratom.
“I was kind of hesitant at first because there’re so many horror stories about 7-OH, but then I researched and I realized that the natural plant is not the same as 7-OH,” she said.
She went to a local shop, Authentic Kratom in Woodland Hills, and spoke to a sales associate who helped her decide which of the 47 strains of kratom it sold would best suit her needs.
Agalopol currently takes a 75-milligram dose of mitragynine, the primary alkaloid in kratom, when necessary. It has enabled her to get back to where she was before her injury: teaching 40 students a week and performing every weekend.
Agalopol believes the county hasn’t done its homework on kratom. “They’re just taking these actions because of public pressure, and public pressure is happening because of ignorance,” she said.
During the course of reporting this story, Authentic Kratom has shut down its three locations; it’s unclear if the closures are temporary. The owner of the business declined to comment on the matter.
When she heard the news of the recent closures, Agalopol was seething. She told The Times she has enough capsules of kratom for now, but when she runs out, her option will have to be Tylenol and ibuprofen, “which will slowly kill my liver.”
“Prohibition is not a public health strategy,” said Jackie Subeck, executive director of 7-Hope Alliance, a nonprofit that promotes safe and responsible access to 7-OH for consumers, at the Feb. 18 Senate hearing. “[It’s] only going to make things worse, likely resulting in an entirely new health crisis for Californians.”
Science
There were 13 full-service public health clinics in L.A. County. Now there are 6
Because of budget cuts, the Los Angeles County Department of Public Health has ended clinical services at seven of its public health clinic sites.
As of Feb. 27, the county is no longer providing services such as vaccinations, sexually transmitted infection testing and treatment, or tuberculosis diagnosis and specialty TB care at the affected locations, according to county officials and a department fact sheet.
The sites losing clinical services are Antelope Valley in Lancaster; the Center for Community Health (Leavy) in San Pedro, Curtis R. Tucker in Inglewood, Hollywood-Wilshire, Pomona, Dr. Ruth Temple in South Los Angeles, and Torrance. Services will continue to be provided by the six remaining public health clinics, and through nearby community clinics.
The changes are the result of about $50 million in funding losses, according to official county statements.
“That pushed us to make the very difficult decision to end clinical services at seven of our sites,” said Dr. Anish Mahajan, chief deputy director of the L.A. County Department of Public Health.
Mahajan said the department selected clinics with relatively lower patient volumes. Over the last month, he said, the department has sent letters to patients about the changes, and referred them to unaffected county clinics, nearby federally qualified health centers or other community providers. According to Mahajan, for tuberculosis patients, particularly those requiring directly observed therapy, public health nurses will continue visiting patients.
Public health clinics form part of the county’s healthcare safety net, serving low-income residents and those with limited access to care. Officials said that about half of the patients the county currently sees across its clinics are uninsured.
Mahajan noted that the clinics were established decades ago, before the Affordable Care Act expanded Medi-Cal coverage and increased the number of federally qualified health centers. He said that as more residents gained access to primary care, utilization at some county-run clinics declined.
“Now that we have a more sophisticated safety net, people often have another place to go for their full range of care,” he said.
Still, the closures have unsettled providers who work closely with local vulnerable populations.
“I hate to see any services that serve our at-risk and homeless community shut down,” said Mark Hood, chief executive of Union Rescue Mission in downtown Los Angeles. “There’s so much need out there, so it always is going to create hardship for the people that actually need the help the most.”
Union Rescue Mission does not receive government funding for its healthcare services, Hood said. The mission’s clinics are open not only to shelter guests, up to 1,000 people nightly, but also to people living on the streets who walk in seeking care.
Its dental clinic alone sees nearly 9,000 patients a year, Hood said.
“We haven’t seen it yet, but I expect in the coming days and weeks we’ll see more people coming through our doors looking for help,” he said. “They’re going to have to find help somewhere.” Hood said women experiencing homelessness are especially vulnerable when preventive care, including sexual and reproductive health services, becomes harder to access.
County officials said staffing impacts so far have been managed through reassignment rather than layoffs. Roughly 200 to 300 positions across the department have been eliminated amid funding cuts, officials said, though many were vacant. About 120 employees whose positions were affected have been reassigned; according to Mahajan, no one has been laid off.
The clinic closures come amid broader fiscal uncertainty. Mahajan said that due to the Trump administration’s “Big Beautiful Bill,” Los Angeles County could lose $2.4 billion over the next several years. That funding, he said, supports clinics, hospitals and community clinic partners now absorbing patients who previously went to the clinics that closed on Feb. 27.
In response, the L.A. County Board of Supervisors has backed a proposed half-cent sales tax measure that would generate hundreds of millions of dollars annually for healthcare and public health services. Voters are expected to consider the measure in June.
Science
Mobile clinic brings mammograms to women on Skid Row
Sharon Horton stepped through the door of a sky-blue mobile clinic and onto a Skid Row sidewalk. She wore a yellow knit beanie, gold hoop earrings and the relieved grin of a woman who has finally checked a mammogram off her to-do list.
It had been years since her last breast cancer screening procedure. This one, which took place in City of Hope’s Cancer Prevention and Screening mobile clinic, was faster and easier. The staff was kind. The machine that X-rayed her breast was more comfortable than the cold hard contraption she remembered.
Relatively speaking, of course — it was still a mammogram.
“It’s like, OK, let me go already!” Horton, 68, said with a laugh.
The clinic was parked on South San Pedro Street in front of Union Rescue Mission, the nonprofit shelter where Horton resides. Within a week, City of Hope, a cancer research hospital, would share the results with Horton and Dr. Mary Marfisee, the mission’s family medical services director. If the mammogram detected anything of concern, they’d map out a treatment plan from there.
Naureen Sayani, 47, a resident of Union Rescue Mission, left, discusses her medical history with Adriana Galindo, a medical assistant, before getting a mammogram on last week.
(Kayla Bartkowski / Los Angeles Times)
“It’s very important to take care of your health, and you need to get involved in everything that you can to make your life a better life,” said Horton, who is looking forward to a forthcoming move into Section 8 housing.
Horton was one of the first patients of a new women’s health initiative from UCLA’s Homeless Healthcare Collaborative at Union Rescue Mission. Staffed by third-year UCLA Medical School students and led by Marfisee, a UCLA assistant clinical professor of family medicine, the clinic treats mission residents as well as unhoused people living in the surrounding neighborhood.
The new cancer screening project arrives at a time of dire financial pressures on county public health services.
Citing rising costs and a $50-million reduction in federal, state and local grant and contract income, the Los Angeles County Department of Public Health on Feb. 27 ended services at seven of 13 public clinics that provide vaccines, tests and treatment for sexually transmitted diseases and other services to housed and unhoused county residents.
Although Union Rescue Mission’s own funding comes mainly from private sources and is less imperiled by public cuts, the 135-year-old shelter expects the need for its services to rise, Chief Executive Mark Hood said.
Even as unsheltered homelessness declined for the last two years across Los Angeles County, the unsheltered population on Skid Row — long seen as the epicenter of the region’s homelessness crisis — grew 9% in 2024, the most recent year for which census data are available.
For many local women navigating daily concerns over housing, food and personal safety, “their own health is not a priority,” Marfisee said.
Those whose problems have become too serious to ignore face daunting obstacles to care. Marfisee recalled one patient who came to her with a lump in her breast and no identification.
In order to get a mammogram, Marfisee explained, the woman first needed to obtain a birth certificate, and then a state-issued identification card. Then she needed to enroll in Medi-Cal. After that, clinic staff helped her find a primary care physician who could order the imaging test.
Given the barriers to preventative care, homeless women die from breast cancer at nearly twice the rate of securely housed women, a 2019 study found. Marfisee’s own survey of the mission’s female residents found that nearly 90% were not up to date on recommended cancer screenings like mammograms and pap smears, which detect early cervical cancer.
To address this gap, Marfisee — a dogged patient advocate — reached out to City of Hope. The Duarte-based research and treatment center unveiled in March 2024 its first mobile cancer screening clinic, a moving van-sized clinic on wheels that it deploys to food banks and health centers, as well as to companies offering free mammograms as an employee benefit.
“In true Dr. Mary fashion, she saw the vision,” said Jessica Thies, the mobile screening program’s regional nursing director. After working through some logistical hurdles, the mission and City of Hope secured a date for the van’s first visit.
The next challenge was getting the word out to patients. Marfisee and her students walked through the surrounding neighborhood, went cot to cot in the women’s dorm and held two informational sessions in December and January to answer patients’ questions.
At the sessions, the team walked through the basics of who should get a mammogram (women age 40 or older, those with a family history of breast cancer) and the procedure itself. (“Like a tortilla maker?” one woman asked skeptically after hearing a description of the mammography unit.)
The medical students were able to dispel rumors some women had heard: The test doesn’t damage breast tissue, nor do the X-rays increase cancer risk. Others questioned a mammogram’s value: What good was it knowing they had cancer if they couldn’t get follow-up care?
On this latter point, Marfisee is determined not to let patients fall through the cracks.
Thirteen patients received mammograms at the van’s first visit on Wednesday. Within a week, City of Hope will contact patients with their results and send them to Marfisee and her team. She is already mentally mapping the next steps should any patient have a situation that requires a biopsy or further imaging: working with their case manager at the mission, calling in favors, wrangling with any insurance the patient might have.
“It’ll be a good fight,” Marfisee said, as residents in the adjacent cafeteria carried trays of sloppy joes and burgers to their lunch tables. “But we’ll just keep asking for help and get it done.”
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