When El Niño exacerbates global warming: Record heat, record flooding, record wildfires
Traffic warden Rai Rogers mans his street corner during an 8-hour shift under the hot sun in Las Vegas, Nevada on July 12, 2023, where temperatures reached 106 degrees amid an ongoing heatwave. More than 50 million Americans are set to bake under dangerously high temperatures this week, from California to Texas to Florida, as a heat wave builds across the southern United States.
Frederic J. Brown | Afp | Getty Images
If you feel like record-level extreme weather events are happening with alarming frequency, you’re not alone. Scientists say it’s not your imagination.
“The number of simultaneous weather extremes we’re seeing right now in the Northern Hemisphere seems to exceed anything at least in my memory,” Michael Mann, professor of earth and environmental science at the University of Pennsylvania, told CNBC.
Globally, June was the hottest June in the 174-year records kept by the National Oceanic and Atmospheric Administration, the federal agency said on Thursday. It was the 47th consecutive June and the 532nd consecutive month in which average temperatures were above the average for the 20th century.
The amount of sea ice measured in June was the lowest global June sea ice on record, due primarily to record-low sea ice levels in the Antarctic, also according to NOAA.
There were nine tropical cyclones in June, defined as storms with wind speeds over 74 miles per hour, and the global accumulated cyclone energy, a measure of the collective duration and strength of tropical storms, was almost twice its average value for 1991–2020 in June, NOAA said.
As of Friday morning, 93 million people in the United States are under excessive heat warnings and heat advisories, the National Weather Service Weather Prediction Center, according to a bulletin published Friday morning. “A searing heat wave is set to engulf much of the West Coast, the Great Basin, and the Southwest,” the National Weather Service said.
A person receives medical attention after collapsing in a convenience store on July 13, 2023 in Phoenix, Arizona. EMT was called after the person said they experienced hot flashes, dizziness, fatigue and chest pain. Record-breaking temperatures continue soaring as prolonged heatwaves sweep across the Southwest.
Brandon Bell | Getty Images News | Getty Images
Flooding in downtown Montpelier, Vermont on Tuesday, July 11, 2023. Vermont has been under a State of Emergency since Sunday evening as heavy rains continued through Tuesday morning causing flooding across the state.
The Washington Post | The Washington Post | Getty Images
On June 27, Canada surpassed the record set in 1989 for total area burned in one season when it reached 7.6 million hectares, or 18.8 million acres. And the total has since increased to 9.3 million hectares, or 23 million acres, which is being driven by record-breaking high temperatures, turning the vegetation into kindling for wildfires to race through.
Those record Canada wildfires have blanketed parts of the United States in smoke, causing some of the worst quality in the world at various points.
A view of the city as smoke from wildfires in Canada shrouds sky on June 30, 2023 in New York City, United States. Canadian wildfires smoke creating a dangerous haze as the air quality index reaches 160 in New York City. People warned to avoid outdoor physical activities and for those who spend time outdoors recommended to use well-fitting face masks when air quality is unhealthy.
Anadolu Agency | Anadolu Agency | Getty Images
In all of 2022, there were 18 separate billion dollar weather and climate disaster events according to data from NOAA, including tornado outbreaks, high wind, hailstorms, tropical cyclones, flooding, drought, heatwaves and wildfires. So far, there have been 12 billion-dollar weather and climate disasters in 2023, according to NOAA.
“This year will almost certainly break records for the number of extreme weather events,” Paul Ullrich, professor of regional and global climate modeling at University of California at Davis, told CNBC.
Global warming is making extreme weather events more severe, scientists said.
“Our own research shows that the observed trend toward more frequent persistent summer weather extremes — heat waves, floods, — is being driven by human-caused warming,” Mann told CNBC.
Ullrich agrees. “Increases in the frequency and intensity of heatwaves, floods and wildfires can be directly attributable to climate change,” Ullrich told CNBC.
Wildfire burns above the Fraser River Valley near Lytton, British Columbia, Canada, on Friday, July 2, 2021. A protracted heat wave continues to fuel scores of wildfires in Canada’s western provinces, with Prime Minister Justin Trudeau calling an emergency meeting of a cabinet crisis group to address the matter.
Bloomberg | Bloomberg | Getty Images
“Through the emission of greenhouse gases, we have been trapping more heat near the surface, leading to increases in temperature, more moisture in the air, and a drier land surface,” Ullrich said. “Scientists are extremely confident that an increasing frequency and intensity of extreme events is a direct consequence of human modification of the climate system.”
Also in June, the weather pattern called “El Niño“ arrived.
El Niño is like adding lighter fuel to an already smoldering fire. “Under recently emergent El Niño conditions, temperatures are pushed higher worldwide, further compounding increases in temperature brought on by greenhouse gas emissions,” Ullrich said.
That combination of anthropogenic climate change and El Niño is “spiking some of these extreme events,” Mann said.
Animation of sea surface temperatures for past 6 months
NOAA
El Niño, which means “little boy” in Spanish, happens when the normal trade winds that blow west along the equator weaken and warmer water gets pushed o the east, toward the west coast of the Americas. In the United States, a moderate to strong El Niño in the fall and winter correlates with wetter-than-average conditions from southern California to the Gulf Coast, and drier-than-average conditions in the Pacific Northwest and Ohio Valley.
When global warming and El Niño are hitting at the same time, “it can be difficult separating what is just a weather event or if it is part of a longer trend,” Timothy Canty, professor in the department of atmospheric and oceanic science at University of Maryland, told CNBC.
But what is clear is that climate change makes it more likely that an extreme weather event will happen.
“Higher temperatures from climate change are indisputable, and with each degree increase we’re multiplying our changes of getting an extreme heat wave. In the wetter regions of the world, including the Northeastern US, we’re expecting more rain and more intense storms,” Ullrich told CNBC. “To avoid even more extreme changes, we need to both reduce our reliance on fossil fuels and act to clean up our polluted atmosphere.”
And as long as global greenhouse gas emissions continues to increase, the trend of more and more frequent extreme weather is expected to continue, Mann says.
Decreasing the greenhouse gas emissions released into the atmosphere by burning fossil fuels will help moderate the extreme weather trends.
An infographic titled “Sea ice in Antarctica drops to lowest level in 43 years” created in Ankara, Turkiye on March 01, 2023. The sea ice level surrounding the Antarctic continent has dropped to its lowest level since 1979.
Editorial #:1247611891, Getty Premium
“The good news is that the latest research shows that the surface warming driving more extreme weather events stabilizes quickly when carbon emissions cease. So we can prevent this all from getting worse and worst by decarbonizing our economy rapidly,” Mann told CNBC.
Every person’s contributions to reducing their climate footprint helps, Canty says.
“People have asked me essentially ‘What can I do as an individual that matters?’ and decide not to do anything and instead blame everyone else. Honestly, it’s societies made up of individuals that have gotten us to this point,” Canty said.
Individuals can reduce their greenhouse gas emissions by making small changes like turning off the lights when they’re not in a room, turning down the heat or up the air conditioning when they’re not home, avoiding food waste and using public transportation.
Voting also matters a lot, Canty said. Government leaders have been able to make successful progress on international environmental crises in the past, Canty said, pointing to the Montreal Protocol. “There is a roadmap for working together to fix environmental problems in ways that benefit everyone,” Canty said.
“Tackling the ozone hole required governments, scientists, and businesses to work together and the Montreal Protocol and its amendments have been very successful not only for ozone but for climate,” Canty said, noting that the same chemicals that deplete the ozone, chlorofluorocarbons, are also very bad greenhouse gasses. “The ozone hole is slowly recovering and because of actions taken in the 80s we’ve avoided even worse planetary warming, and we still have air conditioning and hair spray which seemed to be the big panic at the time.”
If individuals and organizations don’t commit to aggressively reducing their greenhouse gas emissions, however, then this battery of extreme weather is a harbinger of the future.
“If we fail to act what we’re seeing right now is just the tip of the proverbial — melting — iceberg,” Mann told CNBC.
Tesla CEO Elon Musk speaks alongside U.S. President Donald Trump to reporters in the Oval Office of the White House on May 30, 2025 in Washington, DC.
Kevin Dietsch | Getty Images
At Tesla, vehicle sales are slumping, profits are thinning and revenue from regulatory credit sales are poised to dry up due to Republican-led policy changes.
In the past, CEO Elon Musk’s futuristic promises have convinced investors to look past top and bottom line numbers.
Not now.
Following another fairly dismal earnings report this week, Musk told analysts on the call that Tesla’s electric vehicles will soon become driverless, making money for owners while they sleep. He also said Tesla’s robotaxi service, which the company recently started testing in a limited capacity in Austin, Texas, will expand to other states, with a goal of being able to reach half the U.S. population by year-end, “assuming we have regulatory approvals.”
It didn’t matter.
Tesla shares plummeted 8% on Thursday as investors focused on the immediate challenges facing the company, including the rapid rise of lower-cost EV competitors, particularly in China, and a political backlash against Musk that harmed Tesla’s brand in the U.S. and Europe.
Automotive sales declined 16% year-over-year in the second quarter for the EV maker, with weak sales numbers continuing in Europe and California. Musk said there could be a “few rough quarters” ahead because of the EV credits expiring and President Donald Trump’s tariffs.
The stock bounced back some on Friday, gaining 3.5%, but still ended the week down and has now fallen 22% this year, the worst performance among tech’s megacaps. The Nasdaq rose 1% for the week and is up more than 9% in 2025, closing at a record on Friday.
“Look, we love robotaxis. And robots,” wrote analysts at Canaccord Genuity, who recommend buying Tesla’s stock, in a note after the earnings report. “Over time, Tesla is well positioned to benefit from these future-forward opportunities.”
The analysts, however, said that they’re focused on the profit and loss statement, writing: “But we love growth too, in the here and now. We need the P&L dynamics to turn.”
Analysts at Jefferies described the earnings update as “a bit dull.” And Goldman Sachs said Tesla’s robotaxi effort is “still small” with limited technical data points.
Tesla didn’t respond to a request for comment.
Musk, who has previously called himself “pathologically optimistic,” has been able to sway shareholders and send the stock soaring at times with promises of self-driving cars, humanoid robots and more affordable EVs.
But after a decade of missed self-imposed deadlines on autonomous driving, Wall Street is watching Tesla fall behind Alphabet’s Waymo in the U.S. and Baidu’s Apollo Go in China.
In Tesla’s shareholder deck, the company said the second quarter marked the start of its “transition from leading the electric vehicle and renewable energy industries to also becoming a leader in AI, robotics and related services.” The company didn’t offer any new guidance for growth or profits for the year ahead.
Regulatory hurdles
Business Insider reported on Friday that Tesla told staff its robotaxi service could launch in the San Francisco Bay Area as soon as this weekend.
But Tesla hasn’t applied for permits that would be required to run a driverless ridehailing service in California, CNBC confirmed. The company would first need authorizations from the state’s Department of Motor Vehicles and the California Public Utilities Commission (CPUC).
The CPUC told CNBC on Friday, that under existing permits, Tesla can only operate a human-driven chartered vehicle service, not carry passengers in robotaxis.
Waymo driverless vehicles wait at a traffic light in Santa Monica, California, on May 30, 2025.
Daniel Cole | Reuters
On the earnings call, Musk and other Tesla execs claimed the company was working on regulatory approvals to launch in Nevada, Arizona, Florida and other markets, in addition to San Francisco, but offered no details about what would be required.
Within Austin, the company said its robotaxi service had driven 7,000 miles, and that Tesla has been restricting its robotaxis’ to roads with a speed limit of 40 miles per hour. The Austin service involves a small fleet of about 10 to 20 Model Y vehicles equipped with the company’s latest self-driving systems.
The Tesla robotaxis rely on remote supervision by employees in a customer service center, and a human safety supervisor in the front passenger seat, ready to intervene if needed.
Compare that to what Alphabet said on its second-quarter earnings call the same day as Tesla’s results.
“The Waymo Driver has now autonomously driven over 100 million miles on public roads, and the team is testing across more than 10 cities this year, including New York and Philadelphia,” Alphabet said. Meanwhile, Waymo has become significant enough that Alphabet added a category to its Other Bets revenue description in its latest quarterly filing.
“Revenues from Other Bets are generated primarily from the sale of autonomous transportation services, healthcare-related services and internet services,” the filing said. The Other Bets segment remains relatively small, with revenue coming in at $373 million in the quarter.
Regardless of investor skepticism, Musk is more bullish than ever.
On Friday, the world’s richest person posted on his social network X that he thinks Tesla will someday be worth $20 trillion. On the earnings call earlier in the week, he said that when it comes to AI for cars and robots, “Tesla is actually much better than Google by far” and “much better than anyone at real world AI.”
CORRECTION: The Waymo Driver has now autonomously driven over 100 million miles on public roads, according to Alphabet. A previous version misstated the number of miles.
WATCH: Tough quarter for Tesla
A vehicle Tesla is using for robotaxi testing purposes on Oltorf Street in Austin, Texas, US, on Sunday, June 22, 2025.
Tim Goessman | Bloomberg | Getty Images
In an earnings call this week, Tesla CEO Elon Musk teased an expansion of his company’s fledgling robotaxi service to the San Francisco Bay Area and other U.S. markets.
But California regulators are making clear that Tesla is not authorized to carry passengers on public roads in autonomous vehicles and would require a human driver in control at all times.
“Tesla is not allowed to test or transport the public (paid or unpaid) in an AV with or without a driver,” the California Public Utilities Commission told CNBC in an email on Friday. “Tesla is allowed to transport the public (paid or unpaid) in a non-AV, which, of course, would have a driver.”
In other words, Tesla’s service in the state will have to be more taxi than robot.
Tesla has what’s known in California as a charter-party carrier permit, which allows it to run a private car service with human drivers, similar to limousine companies or sightseeing services.
The commission said it received a notification from Tesla on Thursday that the company plans to “extend operations” under its permit to “offer service to friends and family of employees and to select members of the public,” across much of the Bay Area.
But under Tesla’s permit, that service can only be with non-AVs, the CPUC said.
The California Department of Motor Vehicles told CNBC that Tesla has had a “drivered testing permit” since 2014, allowing the company to operate AVs with a safety driver present, but not to collect fees. The safety drivers must be Tesla employees, contractors or designees of the manufacturer under that permit, the DMV said.
In Austin, Texas, Tesla is currently testing out a robotaxi service, using its Model Y SUVs equipped with the company’s latest automated driving software and hardware. The limited service operates during daylight hours and in good weather, on roads with a speed limit of 40 miles per hour.
Robotaxis in Austin are remotely supervised by Tesla employees, and include a human safety supervisor in the front passenger seat. The service is now limited to invited users, who agree to the terms of Tesla’s “early access program.”
On Friday, Business Insider, citing an internal Tesla memo, reported that Tesla told staff it planned to expand its robotaxi service to the San Francisco Bay Area this weekend. Tesla didn’t respond to a request for comment on that report.
In a separate matter in California, the DMV has accused Tesla of misleading consumers about the capabilities of its driver assistance systems, previously marketed under the names Autopilot and Full Self-Driving (or FSD).
Tesla now calls its premium driver assistance features, “FSD Supervised.” In owners manuals, Tesla says Autopilot and FSD Supervised are “hands on” systems, requiring a driver at the wheel, ready to steer or brake at all times.
But in user-generated videos shared by Tesla on X, the company shows customers using FSD hands-free while engaged in other tasks. The DMV is arguing that Tesla’s license to sell vehicles in California should be suspended, with arguments ongoing through Friday at the state’s Office of Administrative Hearings in Oakland.
Under California state law, autonomous taxi services are regulated at the state level. Some city and county officials said on Friday that they were out of the loop regarding a potential Tesla service in the state.
Stephanie Moulton-Peters, a member of the Marin County Board of Supervisors, said in a phone interview that she had not heard from Tesla about its plans. She urged the company to be more transparent.
“I certainly expect they will tell us and I think it’s a good business practice to do that,” she said.
Moulton-Peters said she was undecided on robotaxis generally and wasn’t sure how Marin County, located north of San Francisco, would react to Tesla’s service.
“The news of change coming always has mixed results in the community,” she said.
Brian Colbert, another member of the Marin County Board of Supervisors, said in an interview that he’s open to the idea of Tesla’s service being a good thing but that he was disappointed in the lack of communication.
“They should have done a better job about informing the community about the launch,” he said.
Alphabet’s Waymo, which is far ahead of Tesla in the robotaxi market, obtained a number of permits from the DMV and CPUC before starting its driverless ride-hailing service in the state.
Waymo was granted a CPUC driverless deployment permit in 2023, allowing it to charge for rides in the state. The company has been seeking amendments to both its DMV and CPUC driverless deployment permits as it expands its service territory in the state.
— NBC’s David Ingram reported from San Francisco.
WATCH: Waymo testing self-driving cars with human drivers in New York and Philadelphia
Meta CEO Mark Zuckerberg makes a keynote speech during the Meta Connect annual event, at the company’s headquarters in Menlo Park, California, on Sept. 25, 2024.
Manuel Orbegozo | Reuters
Meta CEO Mark Zuckerberg on Friday said Shengjia Zhao, the co-creator of OpenAI’s ChatGPT, will serve as the chief scientist of Meta Superintelligence Labs.
Zuckerberg has been on a multibillion-dollar artificial intelligence hiring blitz in recent weeks, highlighted by a $14 billion investment in Scale AI. In June, Zuckerberg announced a new organization called Meta Superintelligence Labs that’s made up of top AI researchers and engineers.
Zhao’s name was listed among other new hires in the June memo, but Zuckerberg said Friday that Zhao co-founded the lab and “has been our lead scientist from day one.” Zhao will work directly with Zuckerberg and Alexandr Wang, the former CEO of Scale AI who is acting as Meta’s chief AI officer.
“Shengjia has already pioneered several breakthroughs including a new scaling paradigm and distinguished himself as a leader in the field,” Zuckerberg wrote in a social media post. “I’m looking forward to working closely with him to advance his scientific vision.”
In addition to co-creating ChatGPT, Zhao helped build OpenAI’s GPT-4, mini models, 4.1 and o3, and he previously led synthetic data at OpenAI, according to Zuckerberg’s June memo.
Meta Superintelligence Labs will be where employees work on foundation models such as the open-source Llama family of AI models, products and Fundamental Artificial Intelligence Research projects.
The social media company will invest “hundreds of billions of dollars” into AI compute infrastructure, Zuckerberg said earlier this month.
“The next few years are going to be very exciting!” Zuckerberg wrote Friday.
WATCH: Meta announces massive ‘Prometheus’ & ‘Hyperion’ data center plans
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