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It's time for physicians to step up and join the climate fight. This is not just an environmental issue; it’s a public health issue.
April 28 is National Superhero Day. It’s a shame that Superman is fictional, because our planet needs saving from its most deadly threat: climate change. Our real heroes will come from science, not planet Krypton.
The threat of climate change is not theoretical, and neither are the health impacts. The Earth was 2.3°F warmer in 2024 than during the 20th-century average, and the 10 warmest recorded years have all taken place between 2015 and 2024. According to the World Health Organization, 3.6 billion people already live in areas highly vulnerable to climate change. Climate-driven deaths are rising, from heat illness and malnutrition to vector-borne disease and disasters such as flooding. Thirty-seven percent of heat-related deaths are linked to human-induced warming, a number expected to climb.
Yet at the very moment when the world needs bold climate action, the Trump administration has taken major steps backward. The United States, historically the world's largest emitter, pulled out of the Paris Agreement and failed to show at last year's United Nations Climate Change Conference, sending clear messages to international partners. Federal disinvestment has been staggering: The latest proposed federal budget will cut the Environmental Protection Agency’s budget by 52% and the National Oceanic and Atmospheric Administration's by 32%. Funding for climate change research has been gutted across major universities. We are not on track to reach net-zero emissions by 2050, a deadline scientists view as essential for planetary stability. This backslide disproportionately harms low-income communities, contributing to rising climate-related mortality.
Even as the US retreats from its international and domestic commitments to reduce emissions, America still has a league of planet defenders made up of scientists, engineers, and activists. They may not have capes, but their work saves lives.
No one is coming to save us, and while the impacts of climate change may feel distant to some healthcare providers, the rest of us cannot afford to sit this one out.
It's time for physicians to step up and join the fight. This is not just an environmental issue; it’s a public health issue. All the statistics about heatwaves, floods, and disasters aren’t just abstract; they’re at the bedside. We’re seeing the direct impacts of climate change in emergency medicine as it affects both the types of diseases we’re treating and how we deliver care.
As a physician myself, I know asking overworked healthcare providers to do more is, well, a big ask. But research shows that physicians are viewed as credible messengers on climate-related issues. Our voices and expertise matter, not just in clinics and operating rooms, but in our communities. We know that change does not just come in the form of lobbying and big communication campaigns. Often, it can come from everyday conversations. It can look like asking patients how they keep their medications cool during a heatwave or reviewing their asthma action plan in preparation for wildfire season. By leading with curiosity, we can help patients make the connection between their environment and its effect on their health.
It can take the form of a discussion with your colleagues about eco-friendly prescribing, like opting for tablets over liquid formulations or dry powders instead of propellant inhalers. Within our hospitals and clinics, we can make simple changes like adding recycling bins and minimizing the use of single-use disposables. Plastic waste is a huge problem in the medical field, but it’s a scalable problem within our control.
No one is coming to save us, and while the impacts of climate change may feel distant to some healthcare providers, the rest of us cannot afford to sit this one out. Joining the Justice League of climate change advocacy does not mean taking on everything; it means starting with doing something. The planet doesn’t need a superhero; it needs all of us to take a step toward changing our practice.
"Dangerous climate breakdown is already here, and killing people—now, today."
The National Oceanic and Atmospheric Administration confirmed Thursday that last month—which featured a heatwave that cooked the US West and caused a snow drought—was the hottest March in the 132-year record for the contiguous United States.
The average temperature "was 50.85°F, 9.35°F above the 20th-century average, marking the first time any month's average has exceeded 9°F above that baseline," according to NOAA's National Centers for Environmental Information. NCEI also said April 2025-March 2026 was the warmest 12-month span observed for the Lower 48 since recordkeeping began in 1895, and over half of the area had its hottest single March day on record, dating back to 1950.
"Maximum daytime temperatures were especially high, averaging 11.4°F above the March average and 0.9°F above the April long-term average," NCEI noted. "Ten states recorded their warmest March on record: Arizona, California, Colorado, Idaho, Nevada, New Mexico, Oklahoma, Texas, Utah, and Wyoming. Across all of these states, average temperatures exceeded their respective April averages, with California also eclipsing its average May temperature by 0.7°F."

In a social media thread about the findings, Shel Winkley, the senior engagement specialist and meteorologist at Climate Central, stressed that "our overheating planet played a major role."
"Out of 192 cities analyzed by Climate Central, 111 experienced at least one week of heat made [more than two times] more likely by human-caused warming," he noted. "The Southwest averaged 25 out of 31 days with heat made at least two times more likely."
The "most staggering" statistic, he said, is that "on March 20, 29% of the Lower 48 saw heat made [more than five times] more likely by our warming atmosphere. Put simply: Heat that would be virtually impossible without that fingerprint."
⚠️ Most staggering stat:
On March 20, 29% of the lower 48 saw heat made 5x+ more likely by our warming atmosphere.
Put simply: heat that would be virtually impossible without that fingerprint.
Largest climate-influenced area on record since at least 1970 pic.twitter.com/1Nsjvpj5jX
— Shel Winkley (@shelwinkleywx) April 9, 2026
Winkley told The Associated Press that "what we experienced in March across the United States was unprecedented," while Yale Climate Connections meteorologist Jeff Masters said that the new batch of broken records "tells us that climate change is kicking our butts."
The "January through March period was the driest on record for the contiguous US. So not only was it hot, it was record dry as well," Masters said. "And that's a bad combination for water availability, for agriculture, for river levels, for navigation."
Looking ahead, NOAA warned that "drought is expected to persist and expand across much of the interior West, Southwest, Rockies, and High Plains, as well as parts of the South, Southeast, and Mid-Atlantic... Significant wildland fire potential is above normal across portions of the Southwest, southern Plains, and central High Plains, and much of the Deep South and Southeast."
The AP also pointed out that both the US agency and Europe's Copernicus are "forecasting a 'super' strong El Niño to form in a few months and intensify into the winter. Meteorologists expect that to increase already warm temperatures across the globe, likely pushing past the hottest year mark set by 2024."
Already, as governments across the globe, including the Big Oil-backed Trump administration, refuse to take the actions that the scientific community argues are necessary to address the climate emergency—most notably, swiftly shift away from planet-warming fossil fuels—humanity is contending with deadly conditions during heatwaves.
For a study published last month in the journal Nature Communications, researchers examined heatwaves in Mecca, Saudi Arabia (2024); Bangkok, Thailand (2024); Phoenix, Arizona, the United States (2023); Mount Isa, Australia (2019); Larkana, Pakistan (2015); and Seville, Spain (2003). During each, they found spans of "nonsurvivable" conditions for people ages 65 and older in direct sun.
"My first thought was, 'Oh shit'—I really didn't expect to see that, especially when you zoom in to individual cities," Sarah Perkins-Kirkpatrick, the study's lead author and a professor at the Australian National University, told The Guardian in reporting published Wednesday. "If it's already happening now, then what does a future that is two or three degrees warmer hold?"
Sharing the report on social media, Bill McGuire, a volcanologist and emeritus professor at University College London, said, "As some of us have been saying for quite a while, dangerous climate breakdown is already here, and killing people—now, today."
"Extreme heatwaves like the one impacting the Western US this month are one of the catastrophic disasters these companies predicted their conduct would bring about," said Public Citizen.
Spring has not yet even begun, but as science journalist Rebecca Boyle wrote Thursday for The Atlantic, "it feels like we skipped right to summer" across the Western United States, which is facing record temperatures this week.
As of Monday, 39 million people across California, Nevada, and Arizona were under heat alerts. Temperatures in Los Angeles are reaching "25-35 degrees above normal," records are being "rewritten" in Las Vegas, and Phoenix is facing temperatures of 105°F two months earlier than usual, according to warnings issued by the National Weather Service (NWS) this week.
"This is not normal. Or at least it wasn’t normal in the past," said Boyle, who explained that it was the result of hot air being trapped by "a bizarrely strong ridge of high pressure in Earth’s atmosphere," the kind that would be uncommonly strong even in the summer.
Citing a model created by the nonprofit group Climate Central, she said that human-caused climate change had made these extreme temperatures five times more likely.
The NWS warned that a heatwave in March is "very dangerous, particularly for those not acclimated to the heat and/or traveling from cooler climates.”
Counts by the US Centers for Disease Control and Prevention (CDC) show that 1,600-2,400 Americans die each year from heat-related causes, and they've more than doubled since 1999.
Meanwhile, a report from the Federation of American Scientists last year found that "the combined effects of extreme heat cost [the US] over $162 billion in 2024—equivalent to nearly 1% of the US GDP."
The Western United States has recently experienced its warmest winter on in recorded history, leading to a record snow drought. Scientists say this has depleted water supplies and will make the region more vulnerable to wildfires and drought later this year.
Climate scientist Daniel Swain told ABC News 10 of Northern California that this is only the beginning of how the climate crisis will impact the state in the coming decades.
"The hottest hots are already getting hotter, and they will continue to get hotter. We haven't seen the hottest temperatures that we're going to see in the next 20 or 30 years," Swain said. "We'll see an increasing number of years with severe wildfire conditions... We will also see increased risk of major flood events, either as snowmelt becomes more rapid in the spring or as winter storms drop even more rainfall more quickly."
The consumer advocacy group Public Citizen said heatwaves like this one are unfolding "just as Big Oil predicted."
"A relatively small number of major fossil fuel companies are responsible for the majority of all greenhouse gas emissions generated by humanity. Just 100 companies are responsible for 71% of all global greenhouse gas emissions generated since 1854, and just 57 companies are responsible for 80% of the emissions generated since 2016," explained a report published by the group Thursday.
"These companies didn’t just contribute to this heatwave—they did so knowingly," the report said. "For decades, Big Oil companies were internally forecasting exactly these kinds of climate disasters."
However, the report explains, the industry "developed and orchestrated a multidecade, coordinated campaign to defraud the public about the dangers of climate change, and blocked solutions that could have prevented these disasters."
A study published earlier this month by Geophysical Research Letters showed that as more carbon has been pumped into the atmosphere over the past 10 years, the rate at which the climate is warming has doubled.
Following this trend, it may be as soon as 2030 that the globe surpasses 1.5°C above preindustrial averages, at which point many climate risks, such as heatwaves, biodiversity loss, and food insecurity, are expected to be dramatically amplified, according to the Intergovernmental Panel on Climate Change.
"Big Oil companies have, indeed, cost this country and the world," Public Citizen said. "Extreme heatwaves like the one impacting the Western US this month are one of the catastrophic disasters these companies predicted their conduct would bring about. They should be made to pay."