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Last summer was the hottest in two millennia. We won’t get any relief this year.
An overwhelming majority of Americans will experience above-average heat this summer, and temperatures in more than half of the contiguous United States are expected to top the historical average by at least 2 degrees Fahrenheit, according to AccuWeather. New York is expected to endure twice as many 90-plus-degree days as last year; Boston could experience up to four times as many.
Americans got a taste of what’s to come this week, with a blistering heat wave that began in the Southwest and has scorched the East Coast for the past three days. That heat may have come early based on the historical averages, but considering more recent trends, it’s right on track.
“The biggest changes that we have seen in recent decades is that the heat wave season has been expanding, starting earlier in the late spring and ending later into early fall, on average,” AccuWeather Senior Meteorologist Brett Anderson told Heatmap.
The northern Rockies, Great Lakes, and the Northeast are areas of particular concern, Paul Pastelok, AccuWeather’s Lead Long-Range Forecaster, told Heatmap. Those regions will likely experience less precipitation and more intense heat this summer compared to their historical average. “The Northern Plains and Upper Midwest are tricky,” Pastelok said. “Right now, this area is getting rain, but this could cut off by the very end of June into July, and turn around to dryness with the heat following.”
While temperatures will most likely peak in the interior Southwest — Nevada, Arizona, and New Mexico — by early July, the region can expect temperatures between 112 and 118 degrees until then. Monsoon season, which brings warm winds and rainfall inland, will likely arrive in late July instead of the usual late June, Pastelok said. Peak heat could come much later — anytime between July and September — for those in the Great Lakes, the Ohio Valley, and the Northeast.
The biggest “warm anomalies” are expected in the Southwest and central Rockies, the Great Lakes, the Ohio Valley and the Northeast, according Tom Kines, a senior meteorologist at AccuWeather. “We are looking at anomalies for the entire summer of +4 degrees (F) which is pretty significant over a 3 month period,” Kines wrote in an email to Heatmap.
Heat won’t be the only extreme weather this season. Drought could be severe, particularly in the Southwest — including parts of Texas, Oklahoma, and Kansas, where rainfall could come in below 50% of the historical average. That dry spell could intensify over the northern Plains, Great Lakes, and the Northeast later in the summer. The Gulf Coast, meanwhile, can anticipate a staggering 22 to 36 inches of rain this season — compared to its usual 15 to 24 inches — which will likely make flooding an issue.
After a wetter winter, meteorologists anticipated a slow start to the wildfire season in California and the Southwest. In fact, the number of wildfires this year is expected to come in below average: AccuWeather meteorologists predict 35,000 to 50,000 wildfires this year, compared to a historical average of about 69,000. Yet the fires in California also seem to have picked up speed a little earlier than normal. Last week saw more than two dozen fires in the state, perhaps heralding increased fire activity to come.
So how will we deal with all this? Northern cities, especially, tend to be less equipped to deal with extreme summer heat. In Boston, temperatures reached a record-breaking 98 degrees on Wednesday, a day after Mayor Michelle Wu declared a heat emergency. The city opened cooling centers this week in an attempt to minimize the number of heat-related medical emergencies.
Boston Green New Deal Director Oliver Sellers-Garcia told Heatmap that the city is bringing more government agencies into the heat management effort. The Fire and Parks departments plan to set up misting stations, and the city will continue to provide extra pop-up cooling centers in coordination with Boston’s Centers for Youth and Families. Those strategies, Sellers-Garcia said, “can have an instant benefit for someone, whether it’s just a super hot day and they have to get to work or it’s a declared heat wave.”
In Florida, people are used to chronic heat, Miami-Dade County’s Chief Heat Officer Jane Gilbert told Heatmap. Last year the county had 42 heat advisories (which happens when the thermometer reaches 105) and 70 warnings (110), Gilbert said, and this season is already proving more intense: May was the warmest ever on record in the state. To protect residents, the county has established a comprehensive public awareness campaign that targets those most affected by the heat, including outdoor workers, children, pregnant women, the elderly, and people with chronic illnesses. It also runs more than 30 cooling centers.
According to Gilbert, the goal is to educate people about the extent of heat impacts so they can make better choices — drink more water, find shade, limit physical activity — and protect their health. “We haven’t fully appreciated, historically as a community, how it impacts our lives,” she said.
Here’s what’s happened so far ...
June 24: On Juneteenth, over 82 million Americans were under active National Weather Service extreme heat alerts — but, due to the national holiday, many publicly operated cooling centers were closed. While Boston had opened 14 new facilities in partnership with the Centers for Youth and Families, for instance, none of them stayed open Wednesday.
The same thing happened in New York, where more than 200 cooling centers were closed for the holiday, most of them libraries. While other heat preparedness measures were still in place — Gov. Kathy Hochul announced free admission for state parks — residents counting on a facility near home had to change plans last minute. On Sunday, New York turned 45 public schools into cooling centers, this time because the public libraries were closed due to budget cuts.
In Chicago, only one cooling center was open during the holiday. The lack of cooling spaces available sparked action from homelessness advocates, who are urging the city to offer more cooling centers that are open 24/7 and also to make those facilities available when the heat index is above 80 degrees Fahrenheit.
Because cooling centers are often multi-purpose spaces, data on their usage is limited. In Boston, 245 people visited cooling centers from June 18 to 20, the mayor’s office told me. New York City’s Department of Emergency Management could only say that six people visited four of the schools open Sunday.
June 21: Communities from Kansas to Maine experienced record-breaking temperatures, with heat indices above 100 degrees Fahrenheit in some places. Cities including Philadelphia, Cleveland, and Burlington, Vermont opened cooling centers, and Boston and New York activated heat emergency plans. Schools in Buffalo, New York moved to half-day schedules for the week in response to temperature advisories.
The heat wave was expected to hold into the weekend, increasing the risk of emergencies. But ensuring that at-risk residents are aware of public services and heat mitigation strategies is often more difficult than simply providing amenities like cooling centers and air conditioners, Benjamin Zaitchik, a professor of climate dynamics at Johns Hopkins University, told Heatmap. “Preventing heat deaths — in principle, at least — is easy,” Zaitchik said. “It just requires good planning, good communication, good networks.”
The same heatwave afflicted much of the Southwestern United States the week before. Temperatures in Phoenix and Las Vegas exceeded 110 degrees, breaking records and prompting cities to issue heat advisories covering tens of millions of people. At a Trump rally in Las Vegas, 24 people received treatment for heat-related complications and six were hospitalized, The Guardianreported.
June 14-19:More than 1,000 people died during the sacred Muslim pilgrimage known as the hajj as extreme heat gripped Saudi Arabia in mid-June. In Mecca, where temperatures exceed 120 degrees Fahrenheit, worshippers gripped umbrellas and water bottles to combat the heat. A study from 2019 predicted that hajj conditions would exceed an “extreme danger heat threshold” more frequently in the coming decades, especially when the pilgrimage — which is scheduled according to the lunar calendar — coincides with the warmer months of the year.
The death toll was about five times higher than last year, according to CNN.
June 10: Passengers on a Qatar Airways flight passed out from heat as their plane sat on the tarmac at Athens International Airport. Flight 204, which was delayed for three hours with passengers stuck inside, experienced a malfunction in its air conditioning. Two days later, authorities shut down the Acropolis for five hours due to the 102 degree weather, which marked Greece’s earliest heat wave on record. Many schools were also closed for the day, and several air-conditioned spaces were opened to the public. Greece’s Health Ministry advised older people and those with chronic illnesses to stay indoors.
The intense weather continued throughout the weekend, and at least five tourists were reported to have died due to extreme heat.
Other parts of Southern Europe, such as Cyprus and Turk, have also suffered through heat waves this year. During the second week of June, temperatures in Cyprus exceeded 104 degrees every day and classes ended early. On June 14, some areas experienced their hottest June day ever, reaching 113 degrees. That same week, Turkey also battled record temperatures — they were 8 to 12 degrees higher than the average for the season.
May and June: Both Mexico and India faced extreme temperatures during national elections.
Record-breaking heat waves have scorched Mexico since late March, causing blackouts, wildfires, heat strokes, and animal deaths. On May 25, Mexico City set a new heat record, with the temperature there surpassing 94.4 degrees, while other cities in the country registered even higher temperatures — well above 115 degrees. As of June 12, at least 125 deaths had been attributed to the heat, which has been made worse by an intense drought linked to El Niño. With reservoirs at less than 27% capacity, millions could run out of water by the end of this month.
World Weather Attribution, a research group that analyzes the degree to which climate change is causing extreme weather events, estimated that global warming has made extreme temperatures in the region 35 times more likely. “These trends will continue with future warming and events like the one observed in 2024 will be very common” in a world where average temperatures are 2 degrees Celsius higher than pre-industrial levels, the group stated in a release.
Despite sweltering conditions, about 100 million voters elected Claudia Sheinbaum, Mexico’s first female president, on June 2. In her victory speech, Sheinbaum, a climate scientist with a focus on energy engineering, said she will work to maintain the country’s energy sovereignty. While Sheinbaum has vouched to expand the country’s renewable energy, she has also been criticized for her support of Pemex, the state-owned oil company.
Two days later, on June 4, India re-elected Prime Minister Narendra Modi for a third term during the country’s longest-ever heatwave. By the time the weeks-long voting process wrapped, extreme heat had killed more than 100 people. In Uttar Pradesh, at least 33 poll workers died in a single day, CNN reported. In response, local governments have imposed measures to prevent water waste and protect construction workers. Yet, according to analysis by the Centre for Policy Research found in 2023, most of India’s heatwave policies are underfunded and fail to target the country’s most vulnerable groups.
More extreme weather hammered Mexico beginning June 20 as tropical storm Alberto brought torrential rain and flooding to the country’s east. AccuWeather meteorologists said the storm is just the start of a predicted intense hurricane season in the area. Most of India is still under heatwave alerts, but the weather is set to improve in the next few days as the monsoon finally advances after a week-long delay.
May: Scarce rainfall and soaring heat have led to drought conditions that are threatening China’s food production and water supply. The provinces of Shandong and Henan — crucial to the country’s wheat production — are some of the most affected, and the State Flood Control and Drought Relief Headquarters has dispatched two disaster relief guidance teams. New technology, such as multi-functional seeders, and multiple reservoirs have been deployed to ameliorate conditions.
Also on Wednesday, the China Meteorological Administration reported that several regional weather stations recorded the highest temperatures ever in mid-June. Conditions are expected to worsen, as some Chinese provinces are expected to reach 111 degrees this week.
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New research out today shows a 10-fold increase in smoke mortality related to climate change from the 1960s to the 2010.
If you are one of the more than 2 billion people on Earth who have inhaled wildfire smoke, then you know firsthand that it is nasty stuff. It makes your eyes sting and your throat sore and raw; breathe in smoke for long enough, and you might get a headache or start to wheeze. Maybe you’ll have an asthma attack and end up in the emergency room. Or maybe, in the days or weeks afterward, you’ll suffer from a stroke or heart attack that you wouldn’t have had otherwise.
Researchers are increasingly convinced that the tiny, inhalable particulate matter in wildfire smoke, known as PM2.5, contributes to thousands of excess deaths annually in the United States alone. But is it fair to link those deaths directly to climate change?
A new study published Monday in Nature Climate Change suggests that for a growing number of cases, the answer should be yes. Chae Yeon Park, a climate risk modeling researcher at Japan’s National Institute for Environmental Studies, looked with her colleagues at three fire-vegetation models to understand how hazardous emissions changed from 1960 to 2019, compared to a hypothetical control model that excluded historical climate change data. They found that while fewer than 669 deaths in the 1960s could be attributed to climate change globally, that number ballooned to 12,566 in the 2010s — roughly a 20-fold increase. The proportion of all global PM2.5 deaths attributable to climate change jumped 10-fold over the same period, from 1.2% in the 1960s to 12.8% in the 2010s.
“It’s a timely and meaningful study that informs the public and the government about the dangers of wildfire smoke and how climate change is contributing to that,” Yiqun Ma, who researches the intersection of climate change, air pollution, and human health at the Yale School of Medicine, and who was not involved in the Nature study, told me.
The study found the highest climate change-attributable fire mortality values in South America, Australia, and Europe, where increases in heat and decreases in humidity were also the greatest. In the southern hemisphere of South America, for example, the authors wrote that fire mortalities attributable to climate change increased from a model average of 35% to 71% between the 1960s and 2010s, “coinciding with decreased relative humidity,” which dries out fire fuels. For the same reason, an increase in relative humidity lowered fire mortality in other regions, such as South Asia. North America exhibited a less dramatic leap in climate-related smoke mortalities, with climate change’s contribution around 3.6% in the 1960s, “with a notable rise in the 2010s” to 18.8%, Park told me in an email.
While that’s alarming all on its own, Ma told me there was a possibility that Park’s findings might actually be too conservative. “They assume PM2.5 from wildfire sources and from other sources” — like from cars or power plants — “have the same toxicity,” she explained. “But in fact, in recent studies, people have found PM2.5 from fire sources can be more toxic than those from an urban background.” Another reason Ma suspected the study’s numbers might be an underestimate was because the researchers focused on only six diseases that have known links to PM2.5 exposure: chronic obstructive pulmonary disease, lung cancer, coronary heart disease, type 2 diabetes, stroke, and lower respiratory infection. “According to our previous findings [at the Yale School of Medicine], other diseases can also be influenced by wildfire smoke, such as mental disorders, depression, and anxiety, and they did not consider that part,” she told me.
Minghao Qiu, an assistant professor at Stony Brook University and one of the country’s leading researchers on wildfire smoke exposure and climate change, generally agreed with Park’s findings, but cautioned that there is “a lot of uncertainty in the underlying numbers” in part because, intrinsically, wildfire smoke exposure is such a complicated thing to try to put firm numbers to. “It’s so difficult to model how climate influences wildfire because wildfire is such an idiosyncratic process and it’s so random, ” he told me, adding, “In general, models are not great in terms of capturing wildfire.”
Despite their few reservations, both Qiu and Ma emphasized the importance of studies like Park’s. “There are no really good solutions” to reduce wildfire PM2.5 exposure. You can’t just “put a filter on a stack” as you (sort of) can with power plant emissions, Qiu pointed out.
Even prescribed fires, often touted as an important wildfire mitigation technique, still produce smoke. Park’s team acknowledged that a whole suite of options would be needed to minimize future wildfire deaths, ranging from fire-resilient forest and urban planning to PM2.5 treatment advances in hospitals. And, of course, there is addressing the root cause of the increased mortality to begin with: our warming climate.
“To respond to these long-term changes,” Park told me, “it is crucial to gradually modify our system.”
On the COP16 biodiversity summit, Big Oil’s big plan, and sea level rise
Current conditions: Record rainfall triggered flooding in Roswell, New Mexico, that killed at least two people • Storm Ashley unleashed 80 mph winds across parts of the U.K. • A wildfire that broke out near Oakland, California, on Friday is now 85% contained.
Forecasters hadn’t expected Hurricane Oscar to develop into a hurricane at all, let alone in just 12 hours. But it did. The Category 1 storm made landfall in Cuba on Sunday, hours after passing over the Bahamas, bringing intense rain and strong winds. Up to a foot of rainfall was expected. Oscar struck while Cuba was struggling to recover from a large blackout that has left millions without power for four days. A second system, Tropical Storm Nadine, made landfall in Belize on Saturday with 60 mph winds and then quickly weakened. Both Oscar and Nadine developed in the Atlantic on the same day.
Hurricane OscarAccuWeather
The COP16 biodiversity summit starts today in Cali, Colombia. Diplomats from 190 countries will try to come up with a plan to halt global biodiversity loss, aiming to protect 30% of land and sea areas and restore 30% of degraded ecosystems by 2030. Discussions will revolve around how to monitor nature degradation, hold countries accountable for their protection pledges, and pay for biodiversity efforts. There will also be a big push to get many more countries to publish national biodiversity strategies. “This COP is a test of how serious countries are about upholding their international commitments to stop the rapid loss of biodiversity,” said Crystal Davis, Global Director of Food, Land, and Water at the World Resources Institute. “The world has no shot at doing so without richer countries providing more financial support to developing countries — which contain most of the world’s biodiversity.”
A prominent group of oil and gas producers has developed a plan to roll back environmental rules put in place by President Biden, The Washington Post reported. The paper got its hands on confidential documents from the American Exploration and Production Council (AXPC), which represents some 30 producers. The documents include draft executive orders promoting fossil fuel production for a newly-elected President Trump to sign if he takes the White House in November, as well as a roadmap for dismantling many policies aimed at getting oil and gas producers to disclose and curb emissions. AXPC’s members, including ExxonMobil, ConocoPhillips, and Hess, account for about half of the oil and gas produced in the U.S., the Post reported.
A new report from the energy think tank Ember looks at how the uptake of electric vehicles and heat pumps in the U.K. is affecting oil and gas consumption. It found that last year the country had 1.5 million EVs on the road, and 430,000 residential heat pumps in homes, and the reduction in fossil fuel use due to the growth of these technologies was equivalent to 14 million barrels of oil, or about what the U.K. imports over a two-week span. This reduction effect will be even stronger as more and more EVs and heat pumps are powered by clean energy. The report also found that even though power demand is expected to rise, efficiency gains from electrification and decarbonization will make up for this, leading to an overall decline in energy use and fossil fuel consumption.
Ember
The world’s sea levels are projected to rise by more than 6 inches on average over the next 30 years if current trends continue, according to a new study published in the journal Nature. “Such rates would represent an evolving challenge for adaptation efforts,” the authors wrote. By examining satellite data, the researchers found that sea levels have risen by about .4 inches since 1993, and that they’re rising faster now than they were then. In 1993 the seas were rising by about .08 inches per year, and last year they were rising at .17 inches per year. These are averages, of course, and some areas are seeing much more extreme changes. For example, areas around Miami, Florida, have already seen sea levels rise by 6 inches over the last 31 years.
“As the climate crisis grows more urgent, restoring faith in government will be more important than ever.” –Paul Waldman writing for Heatmap about the profound implications of America becoming a low-trust society.
That means big, bad things for disaster relief — and for climate policy in general.
When Hurricanes Helene and Milton swept through the Southeast, small-government conservatives demanded fast and effective government service, in the form of relief operations organized by the Federal Emergency Management Agency. Yet even as the agency was scrambling to meet the need, it found itself targeted by far-right militias, who prevented it from doing its job because they had been led by cynical politicians to believe it wasn't doing its job.
It’s almost a law of nature, or at least of politics, that when government does its job, few people notice — only when it screws up does everyone pay attention. While this is nothing new in itself, it has increasingly profound implications for the future of government-driven climate action. While that action comes in many forms and can be sold to the public in many ways, it depends on people having faith that when government steps in — whether to create new regulations, invest in new technologies, or provide benefits for climate-friendly choices — it knows what it’s doing and can accomplish its goals.
As the climate crisis grows more urgent, restoring faith in government will be more important than ever. Unfortunately, simply doing the right things — like responding competently to disasters — won’t be enough to convince people that the next climate initiative will do what it’s supposed to.
The number of people expressing faith in government today is nearly as low as it has been in the half-century pollsters have been asking the question. That trust has bounced up and down a bit — it rose after September 11, then fell again during the disastrous Iraq War — but for the last decade and half, only around 20% of Americans say they trust the government most of the time.
It’s partisan, of course: People express more trust when their party controls the White House. And the decline of trust reaches beyond the government. Faith in most of the key institutions of American life — business, education, religion, news media — has fallen in recent decades, sometimes for good reason. The net result is a public skeptical that those in authority have the ability to solve complex problems.
Changing that perspective is extraordinarily difficult, often because of the nature of good and bad news: The former usually happens slowly and invisibly, while the latter often happens dramatically and all at once.
Take the program created in the Energy Department under George W. Bush to provide loans to innovative energy technologies. If most Americans had heard of it, it was because of one company: Solyndra, a manufacturer of innovative but overly expensive solar panels. Undercut by a decline in prices of traditional panels, the company went under, and its $535 million loan was never repaid. Republicans made Solyndra’s failure into a major controversy, claiming that the program showed that government investment in green technology was corrupt, ineffective, and wasteful.
What few people heard about was that the loan program overall not only turned a profit at the time (and for what it’s worth, it still does), it also provided help to many successful companies, even if a few failed — as any venture capital investor could tell you is inevitable. The successes included Tesla, which used its federal loan to ramp up production of the sedans that would turn it from a niche manufacturer of electric roadsters into what it is today. Needless to say, Elon Musk does not advertise the fact that his success was built on government help.
More recently, the hurricane response has shown how partisan polarization can be used to undermine trust in government — especially when Donald Trump is involved. Trump took the opportunity of the hurricanes to accuse the federal government of being both political and partisan, delivering help only to those areas that vote for Democrats. Soon after, he promised to do precisely what he falsely accused the Biden administration of doing, saying that if he is president again, he will withhold disaster aid from California unless Gov. Gavin Newsom changes the state’s water policies to be more to Trump’s liking. “And we’ll say, Gavin, if you don’t do it, we’re not giving any of that fire money that we send you all the time for all the fire, forest fires that you have,” Trump said. And in fact, in his first term Trump did try to withhold disaster aid from blue states.
What sounds like hypocrisy is actually something much more pernicious. As he often does, Trump is arguing not that he is clean and his opponents are dirty, but that everyone is dirty, and it’s just a question of whether government is in the hands of our team or their team. When he says he’ll “drain the swamp,” he’s telling people both that government is corrupt, and the answer is merely to change who gets the spoils. If you believe him, you’ll have no trust in government whatsoever, even if you might think he’ll use it in a way you’ll approve of.
We’ve seen again and again that people want government to perform well and get angry when it doesn’t, but they don’t reward competence when it happens. Which is why making sure systems operate properly and problems are solved is necessary but not sufficient to win back trust. Government’s advocates — especially those who are counting on it to undertake ambitious climate action both now and in the future — need not only to deliver, they have to get better at, for lack of a better word, propaganda. Policy success is not its own advertisement. And despite his ample policy achievements, Joe Biden has not been a charismatic and effective messenger — on the role of government, or much else.
Ronald Reagan used to say that the most frightening words in the English language were “I’m from the government and I’m here to help”; the oft-repeated quip was at the center of his incredibly successful effort to delegitimize government in the eyes of voters. To reverse the decline of trust so people will believe that government has the knowledge and ability to tackle climate change, the public needs to be reminded — often and repeatedly — of what government does well.
Touting past and present successes on climate — and disaster relief, and so many other ways the government solves problems every day — is essential to building support for future climate initiatives. Those successes are all around, it’s just that most people never hear about them or take them for granted. But promoting government as an engine of positive change should be as high a priority for climate advocates, including those who hold public office, as discrediting government was for Reagan and is for Trump.