Science
Earth breaks heat and CO₂ records once again: 'Our planet is trying to tell us something'
Humanity is ignoring major planetary vital signs as atmospheric carbon dioxide levels soar to all-time highs and Earth records its 12th consecutive month of record-breaking heat, international climate officials warned this week.
At 60.63 degrees, the global mean temperature in May was a record 2.73 degrees hotter than the preindustrial average against which warming is measured — marking an astonishing yearlong streak of heat that shows little sign of slowing down, according to the European Union’s Copernicus Climate Change Service.
“For the past year, every turn of the calendar has turned up the heat,” António Guterres, secretary-general of the United Nations, said during a speech in New York on Wednesday. “Our planet is trying to tell us something. But we don’t seem to be listening. We’re shattering global temperature records and reaping the whirlwind. It’s climate crunch time. Now is the time to mobilize, act and deliver.”
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According to the Copernicus service, May was also the 11th consecutive month of warming beyond 2.7 degrees, the Fahrenheit equivalent of the internationally agreed-upon limit of 1.5 degrees Celsius intended to reduce the worst effects of climate change.
Not only was it a warm month, but the global average temperature for the last 12 months — June 2023 through May — was the highest on record, at 2.93 degrees Fahrenheit above the 1850-1900 preindustrial average.
A pedestrian holds an umbrella to protect against the sun in Bangkok, Thailand, in May — Earth’s 12th consecutive hottest month on record.
(Sakchai Lalit / Associated Press)
Guterres said the world is warming so quickly and spewing such considerable CO₂ emissions that the 1.5-degree Celsius goal is “hanging by a thread.”
“The truth is, global emissions need to fall 9% every year until 2030 to keep the 1.5-degree limit alive, but they are heading in the wrong direction,” he told a crowd at the American Museum of Natural History. “We are playing Russian roulette with our planet, and we need an exit ramp off the highway to climate hell.”
Indeed, it’s not just global temperatures that are soaring. Carbon dioxide levels — one of the main drivers of planetary warming — are also climbing to new highs.
Recent readings were 427 parts per million — the highest ever recorded in the month of May, according to Ralph Keeling, director of the CO₂ program at UC San Diego’s Scripps Institution of Oceanography.
Carbon dioxide does not directly provide heat, but the greenhouse gas — which comes from the extraction and burning of fossil fuels — increases the atmosphere’s ability to trap heat that otherwise would be released to space.
CO₂ readings have been primarily measured at the Mauna Loa Observatory in Hawaii since 1958, when they began under Keeling’s father, Charles David Keeling. The graph of accumulating CO₂ levels, known as the Keeling Curve, has been steadily climbing since then.
But the planet isn’t only seeing record CO₂ levels — it is also seeing record gains, Keeling said.
The monthly average CO₂ concentration recorded in March was 4.7 parts per million higher than the reading from March 2023 — breaking the previous record for year-over-year gain, a jump of 4.1 parts per million from June 2015 to June 2016.
“That number was sticking out of the envelope of what we’ve seen in the past,” Keeling said.
Fossil fuels play the biggest role in the recent record numbers, but El Niño also had a hand, he said.
The tropical Pacific climate pattern that arrived last summer is associated with hotter global temperatures, as well as droughts in the tropics and some southern continents. As a result, tropical forests, savannas and grasslands in those areas tend to wither and die and burn in wildfires, contributing to additional CO₂ emissions.
A shopper escapes the outdoor heat in October 2023 at the Asian Garden Mall in Little Saigon in Westminster.
(Allen J. Schaben / Los Angeles Times)
“We have the highest fossil fuel burning, but we also had an El Niño event, and so the combination set a new all-time record,” Keeling said.
When asked how it feels to see the chart that bears his father’s name climb so steadily, Keeling said he mostly feels sad. Though there have been considerable gains in renewable energy and other efforts to reduce fossil fuel emissions, “we haven’t gained enough ground yet to reverse the growth,” he said.
“I just feel sad at all the loss that has been occurring, and will continue to occur, because of this,” he said.
During his speech Wednesday, Guterres said new data show the maximum amount of CO₂ the Earth’s atmosphere can take in order to limit long-term warming to 1.5 degrees Celsius is about 200 billion tons. But current emissions are around 40 billion tons per year, indicating that “the entire carbon budget will be busted before 2030.”
The 1.5-degree limit is not just symbolic — every fraction of a degree could mean the difference between extinction and survival for some small island states and coastal communities, or the difference between minimizing climate chaos and crossing dangerous tipping points, Guterres said.
Consequences of higher global temperatures include the likely collapse of the Greenland and West Antarctic ice sheets and associated sea level rise; the destruction of coral reef systems; the loss of livelihoods for hundreds of millions of people; the collapse of sea currents that would disrupt weather patterns in Europe and other parts of the world; and widespread permafrost melt that would release more heat-trapping methane, among other outcomes, Guterres said.
He said urgent action and global cooperation are needed, and the 2020s will be the make-or-break decade. Cities, states and national governments must all play their part — as must fossil fuel corporations and global financial institutions — with actionable transition plans in place no later than the 2025 U.N. climate conference in Brazil, he said.
“It’s a transformation of society, and it’s a transformation of policy, and it is a real redesign of the priorities that we see in today’s world,” Guterres said. “Unfortunately, climate change has been victim of a diversion of attention, of public opinions, of governments and of media because of the horrible conflicts we are witnessing. … We cannot let them distract us from what is the existential threat of our times for humankind, and that is climate change.”
The latest broken records come as the western United States braces for a significant heat wave beginning this week that could see temperatures soar into the triple digits in many areas.
Portions of California and the Pacific Northwest are expected to see high temperatures well above average for the time of year, forecasters said — as hot as 110 degrees in the San Joaquin and Sacramento valleys, and more than 100 degrees near the northernmost part of the state.
The heat wave is expected to set the stage for a long, hot summer across the vast majority of the country, according to the latest seasonal temperature outlook from the National Oceanic and Atmospheric Administration, which shows strong odds for warmer-than-normal conditions in almost every state.
Copernicus’ director, Carl Buontempo, said the ongoing global heat streak is “shocking but not surprising.”
“While this sequence of record-breaking months will eventually be interrupted, the overall signature of climate change remains and there is no sign in sight of a change in such a trend,” he said in a statement.
“We are living in unprecedented times, but we also have unprecedented skill in monitoring the climate, and this can help inform our action,” Buontempo said. “This string of hottest months will be remembered as comparatively cold but if we manage to stabilize the concentrations of [greenhouse gases] in the atmosphere in the very near future we might be able to return to these ‘cold’ temperatures by the end of the century.”
With five months of data already in the books, there is now a roughly 75% chance that 2024 will surpass 2023 as the planet’s hottest year on record, Zeke Hausfather, a climate scientist with Berkeley Earth, said in a post on the social media site X.
As the records keep tumbling, Hausfather said, it is also looking likely that June will be the hottest June on record as well.
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.”
Science
Can fire-resistant homes be sexy? ‘You be the judge,’ says this Palisades architect
At first glance, it looks like nothing more than a charming Spanish-revival, quintessentially Californian home — but this Pacific Palisades rebuild is constructed like a tank.
Every exterior wall of the steel-framed home is a foot-thick, fire-resistant barricade. The home is connected to a satellite fire monitoring service. Should a fire start in town, sturdy metal shutters descend to cover every window. An exterior sprinkler system can pump 40,000 gallons of water from giant tanks hidden behind the shrubs in the property’s yard. If the cameras and heat sensors around the house detect danger, the system can envelop the home in over 1,000 gallons of fire retardant and hundreds of gallons of fire-suppressing foam.
Palisades resident and architect Ardie Tavangarian is so confident in his design that he even asked the fire department if they could start a controlled fire on the property to test it all out. (They said no.)
Tavangarian built a career designing multimillion-dollar luxury homes in Los Angeles, but after the Palisades fire destroyed 13 of his works — including his family’s home — he found another calling: how to design a house that can handle what the Santa Monica Mountains throw at it. And how to do it quickly and affordably.
Water tanks form part of a backup water supply in a newly built fire-resistant home in Pacific Palisades.
“Nature is so powerful,” he said, sitting on a couch in the new house, which he built for his adult twin daughters. “We are guests living in that environment and expecting, ‘Oh, nature is going to be really kind to me.’ No, it’s not. It does what it’s supposed to do.”
Tavangarian watched the Jan. 1 Lachman fire from his property not far from here; a week later that fire rekindled, grew into the Palisades fire, and burned through his house. But the painful details of the fire — the missteps of the fire department, the empty reservoir — didn’t matter when it came to deciding how to rebuild, he said. The reality is, many fires have burned in these mountains. Many more will.
A sprinkler on the roof is part of a house-wide sprinkler system.
For the architect, who has spent much of his 45-year career designing for luxury, hardening a home against wildfire has brought a new kind of luxury to his homes: peace of mind.
It’s a sentiment that resonates with fire survivors: Tavangarian says he’s received considerable interest from other property owners in the Palisades looking to rebuild their houses.
The metal shutters and advanced outdoor sprinkler system are the flashiest parts of Tavangarian’s home hardening project, and the efficacy of these adaptations is still up for debate. Because the measures have not yet been widely adopted, there are few studies exploring how much or little they protect homes in real-world fires.
Architect Ardie Tavangarian inside the house he designed.
Anecdotal evidence has indicated the effectiveness of sprinklers can vary significantly based on the setup and the conditions during the fire. Extreme wind, for example, can make them less effective. Lab studies have generally found shutters can reduce the risk of windows shattering.
These measures aren’t cheap, either. Sprinkler systems can cost north of $100,000, for example. However, Tavangarian said when all was said and done, the home he built for his daughters cost around $700 per square foot — less than what Palisades residents said they expected to pay, but more than what Altadena residents expected for their rebuilds.
Tavangarian also hopes to see insurers increasingly consider the home-hardening measures property owners take when writing policies, which he said could potentially offset the extra cost in a decade or less. As he explored getting insurance for the new home, one insurer quoted him $80,000 a year. After he convinced the company to visit the property, it lowered the quote to just $13,000, he said.
The house includes metal heat shields that can drop down if a fire approaches.
The home also has essentially all of the other less flashy — but much cheaper and well-proven — home hardening measures recommended by fire professionals: The underside of the roof’s overhang is closed off — a common place embers enter a home. The roof, where burning embers can accumulate, is made of fire-resistant material. The windows, vulnerable to shattering in extreme heat, are made of a toughened glass. There is virtually no vegetation within the first five feet of the home.
When asked if he felt he had compromised on design, comfort or aesthetics for the extra protection — one of the many concerns Californians have with the state’s draft “Zone Zero” requirements that may significantly limit vegetation within five feet of a home — Tavangarian simply said, “You be the judge.”
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