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A summer school program in Roanoke, Virginia, could change the way people think about heat.

According to legend, the ghost of Lucy Addison still roams the halls of her namesake middle school in Roanoke, Virginia. She’s particularly fond of the basement, where the art and technology rooms are.
So when Brian Kreppeneck got a few thermal cameras for a summer program he was running this year, he knew exactly how he was going to teach his students how to use them: with a ghost hunt. He took them downstairs to the auditorium, shut off the lights, and had them train the cameras on things like the air-conditioning vents, a digital clock blinking in one corner, and the empty auditorium stage.
“And wouldn't you know it, as we're looking at the auditorium stage, a little mouse ran across the auditorium,” Kreppeneck, a science teacher at the school, told me. “They screamed and ran out, and that’s how they learned to use the thermal cameras.”
The cameras had a use beyond ghost-hunting and scaring schoolchildren (and mice): The students were going to use them to measure temperatures in and around their school. Over the course of a week, they pointed the cameras at all kinds of things in the world around them, from basketball courts baking in the sun to the shady ground underneath trees. They also clipped sensors to their shoes, which measured ambient temperatures as the kids went about their days. But that was just the beginning.
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“We wanted to develop a curriculum where students learn both about the problem of urban heat, and then also are able to connect that with potential solutions that come from urban planning,” said Theodore Lim, assistant professor of urban affairs and planning at Virginia Tech and the designer of the summer program. “We want them to feel like there are things that [they] could do in [their] own neighborhoods to help mitigate some of those temperatures.”
Urban heat is a longstanding, intractable problem. Study after study has shown that cities are noticeably hotter than surrounding rural areas; this is called the Urban Heat Island effect. Many studies have also shown that the hottest parts of most cities tend to be the areas that house lower-income communities and communities of color, thanks to a dearth of vegetation, tightly packed buildings, and an overabundance of construction materials that radiate heat like concrete. Richer neighborhoods, meanwhile, tend to be lusher, with more space between buildings and, often, building materials like wood or brick that do a better job of dissipating heat.
But understanding just how the built environment affects heat is pretty hard. Meteorologists and weather apps tend to draw data from sensors at airports, which can’t give us any insight into the contours of heat within specific neighborhoods. The numbers we see on our phones often don’t reflect the temperatures we feel; a neighborhood by a river or a park, for example, would be much cooler than a neighborhood with high concentrations of concrete and asphalt, yet residents in both places would see the same temperature in their apps or on TV.
After a week of collecting data with another teacher, the middle-schoolers came back to Kreppeneck’s classroom to figure out what all the numbers had to say. Put together, the data from the thermal cameras and the shoe sensors created something few of us get to see: a personalized look at how the built world around them shaped the way heat worked in their lives. As Lim and Kreppeneck expected, the temperatures the kids experienced were often higher than the temperatures measured by the sensors at a nearby airport, sometimes by as much as 30 degrees Fahrenheit:

Each colored line represents the data from a student at one of the five schools that participated, while the black line represents the temperature reported by the weather station at a nearby airport. If we follow a few of the blue lines, which represent students from Addison middle school — the one with the ghost — we see some of their personal temperatures spiking high above the black line. This could be for a few reasons: maybe they’re playing basketball on a concrete court, or eating lunch outside, or walking around a neighborhood with few trees.
But on each day, when the black line is at its peak, we see almost all of the students’ temperatures dip far below it. That was when the kids were cooling off indoors, often in air-conditioned buildings. As day turns to night, we see temperatures at the weather station dip below what some of the kids experienced indoors. By the next morning, as the kids start going about their days, their lines spike above the weather station again.
“Before they did this activity, if you asked one of these middle school kids if humans can control the temperature outside, they’d say no way,” Lim said. “But then they start to make these correlations: Humans make decisions about where to plant trees, or where to build parking lots, or what color different surfaces should be. And so we kind of do control the outdoor temperature.”
This kind of realization also shifts heat away from being a personal issue that can be solved by, say, drinking water or cranking the air conditioner, to a systemic one. There’s something kind of freeing about this: Lim said that instead of being ashamed that their families might not be able to afford air conditioning, the students came to recognize that their neighborhoods were historically hotter because of decisions made by other people. Northeast and Southeast Roanoke, for example, both saw higher temperatures than the Northwest and Southwest quadrants, and the entire city was significantly hotter than the rest of Roanoke County:

Armed with their temperature data, the students spent the second week of their summer program in Kreppeneck’s class learning about urban planning and mapping out ways their own neighborhoods could be redesigned to mitigate heat.
“As science teachers, we’ve always struggled to make the connection between science in the classroom and home,” Kreppeneck told me. “There’s always been some sort of a wall there, where the kids just think science takes place in the classroom. But giving them a real-world project made these concepts transcend the classroom.”
Kreppeneck also talked to his students about activism and advocating for change. This was the idea of Virginia Tech’s Lim; activism gives the kids a sense of agency over their built environment, and it also encourages them to start conversations with the adults in their lives who previously might not have paid much attention to climate change, whether due to a lack of information or the impression that it didn’t impact them. But climate change continues to push global temperatures higher — this September was the hottest on record — and the effect of climate change on heat is becoming increasingly harder to ignore. Creating policy to deal with those changes, however, is a difficult task.
“In Roanoke, as is probably the case in many cities, there's kind of a lot of contention between the government and some of these more vulnerable communities because of the history of urban renewal,” Lim said.
As Martha Park writes in a beautiful illustrated history for Bloomberg, northeast Roanoke was a thriving home for black and immigrant residents prior to urban renewal, a policy James Baldwin once called “negro removal.” Then, in 1955, the city declared the area “blighted,” seized the entire neighborhood through eminent domain, burned the buildings to the ground, and even exhumed nearly a thousand bodies from the local cemetery, dumping them in a mass grave outside town. Today, the area is mostly pavement and industrial parks.
“There’s a lot of mistrust on both sides,” Lim told me. “I’ve found that using youth-based community science is a relatively uncontroversial way of getting at some issues that actually do have very deep systemic causes.”
This was the third year Lim ran his program in Roanoke. In earlier years, Lim ran the program by himself at just one of the schools; this summer’s group, consisting of 130 students from all five Roanoke middle schools over the course of six weeks, was by far the largest, and Kreppeneck and another teacher took over most of the day-to-day. Going forward, Lim hopes it’ll turn into something more than a middle-school summer program; community leaders are talking about putting together a climate action plan for the city, and he’s exploring the possibility of creating programs at local high schools and churches that build on the middle school curriculum. The idea is to get the message about heat, and the solutions for it, out into the community in as many ways as possible.
Kreppeneck’s already planning on incorporating urban heat into his syllabus for the spring semester, expanding the two-week summer program into something that the students can engage with on a deeper level.
“My hope is that the kids will start talking about it, and start taking ownership,” Kreppeneck said. “Watching the looks on their faces, watching how the wheels started turning as to how they would change their neighborhood, it was very rewarding. If they believe in something, they can make change. It starts with them.”
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On EV investments hitting the brakes, Google’s nuclear restart, and a new data center consensus
Current conditions: Cyclone Montha is poised to make landfall over the Andhra Pradesh coast in eastern India with winds of up to 62 miles per hour • South Africa’s Northern Cape faces extremely high fire risks • Southwest California is also facing high risk of wildfires amid Santa Ana winds and dry, warm conditions today and tomorrow.

Hurricane Melissa has strengthened into a major storm, threatening to make landfall over Haiti, Jamaica, and Cuba as a Category 5 hurricane in the next few hours, with winds up to 180 miles per hour and more than four feet of rainfall. It’s likely to be the strongest storm to hit Jamaica since records started in 1851, with storm surge lapping the coast with waves of up to 15 feet. Already the storm has killed at least six people in the northern Caribbean. Evacuations started on Monday. “This can quickly escalate into a humanitarian crisis where a large number of people are in need of basic supplies such as food, safe drinking water, housing and medical care,” AccuWeather forecasters warned on Monday. “The prolonged nature of impacts can result in entire communities being cut off from aid and support for multiple days.”
The U.S. is just weeks away from reviving a shuttered nuclear plant for the first time, as Holtec International’s Palisades plant in Michigan nears its restart. Once that’s done, the Microsoft-backed project to revive the still-operable reactor at Pennsylvania’s Three Mile Island facility is likely the next nuclear site to come back from permanent decommissioning. Add another to the list. On Monday, Google inked a deal to back the restart of NextEra’s Duane Arnold nuclear plant, Iowa’s only atomic power station. As I reported in this newsletter back in August, NextEra was already considering a restart of the station, which shut down in 2020. It is, as my colleague Katie Brigham wrote in August, the zenith of the "nuclear dealmaking boom.”
The move comes as the U.S. finally embraces large-scale reactors again after years of pegging all future hopes of new nuclear construction on as-yet-unbuilt small modular reactors. On Tuesday, the U.S. government announced an $80 billion deal with Westinghouse to build a fleet of at least eight new power plants with a mix of gigawatt-sized AP1000s and some smaller versions, the Financial Times reported.
Heatmap’s Jael Holzman has breaking news on New York’s energy future: Swiftsure, a 650-megawatt battery energy storage development planned for New York’s Staten Island, was quietly scuttled in August. Rather than make a public announcement, the developer, Fullmark Energy (formerly Hecate), instead wrote a letter to the New York State Department of Public Service withdrawing the proposal. As Jael wrote, “nobody in Staten Island seems to have known until late Friday afternoon when local publication SI Advance first reported the withdrawal.” The project faced heavy opposition, including from New York Republican mayoral candidate Curtis Sliwa. The campaigns of Democrat Zohran Mamdani and independent Andrew Cuomo did not respond to requests for comment.
In other local news, Heatmap’s Jeva Lange is out with a remarkable new series called The Aftermath, a look at surviving the infernos that are increasingly a fact of life in parts of the U.S., especially out West. The series includes stories on the challenges involved in evacuation, why relocation can be impossible, the stories of wildfires that don’t capture national attention, the limits of what the public knows and doesn’t know about wildfires, and the buffers towns such as the fire-scorched Paradise, California, are trying to establish.
Investments in electric vehicle-related infrastructure, including batteries factories, vehicle assembly plants, and charging stations, tumbled by nearly a third to $8.1 billion in the three months leading to September compared to the same period a year earlier, according to the Financial Times. The analysis, based on data from the U.S. Clean Investment Monitor, found that about $7 billion of planned EV investments were abandoned between April and September. The pullback could define the West’s place in the EV industry for years to come, widening China’s lead over production of battery-powered cars. “We need to … be quicker in development to compete with the Chinese,” Hakan Samuelsson, chief executive of Volvo Cars, told the newspaper. “As soon as you weaken these signals, everything will slow down,” he added, referring to the knock-on effect of policy changes emanating from the White House.
When Secretary of Energy Chris Wright last week directed the Federal Energy Regulatory Commission to fast-track interconnection request for large new energy users, he also endorsed the somewhat controversial idea that big electricity users such as data centers should dial back their operations from time to time when the grid is stressed, Latitude Media’s Lisa Martine Jenkins reported last week. On Monday, ChatGPT-maker OpenAI threw its weight behind the idea. In a letter to the White House’s Office of Science and Technology Policy, Christopher Lehane, OpenAI’s chief government affairs officer, called on regulators to “expand use of curtailable load resources and modernize interconnection policy.” Lehane said “we welcomed the news last week that” Wright had expressed support for the policy. “To strengthen grid reliability and expand capacity for AI and other flexible loads, FERC should allow more demand-side participation in wholesale markets and speed up interconnection for large loads that can curtail,” he added.
The idea has been gaining momentum since Duke Energy researcher Tyler Norris put out a landmark paper in February identifying up to 100 gigawatts of additional load the grid could absorb if data centers simply adopted a policy of reducing power consumption when there was a shortage of electrons. Heatmap’s Matthew Zeitlin called it “one weird trick for getting more data centers on the grid.”
Carbon removal startup Rewind has launched DMS Georgia, the first commercial-scale carbon removal operation using deep mine storage. It’s the first time a certified carbon credit will be delivered by plant-based carbon in naturally oxygen-free underground environments. The project aims to bury carbon-emitting biomass in environments where the lack of oxygen makes decomposition impossible. By 2030, Rewind aims to remove one million metric tons of carbon per year.
Fullmark Energy quietly shuttered Swiftsure, a planned 650-megawatt energy storage system on Staten Island.
The biggest battery project in New York has been canceled in a major victory for the nascent nationwide grassroots movement against energy storage development.
It’s still a mystery why exactly the developer of Staten Island’s Swiftsure project, Fullmark Energy (formerly known as Hecate), pulled the plug. We do know a few key details: First, Fullmark did not announce publicly that it was killing the project, instead quietly submitting a short, one-page withdrawal letter to the New York State Department of Public Service. That letter, which is publicly available, is dated August 18 of this year, meaning that the move formally occurred two months ago. Still, nobody in Staten Island seems to have known until late Friday afternoon when local publication SI Advance first reported the withdrawal.
Second, Swiftsure was going to be massive. It was the largest planned battery storage project in New York State, according to public records, with the ability to store upwards of 650 megawatts of electricity — enough to power more than half a million homes. That makes Swiftsure likely one of the largest battery projects in the country, with more capacity than any other energy storage project currently facing opposition in the U.S., according to our very own Heatmap Pro database. This is the second Fullmark project to totally flop in recent months. We reported last week that one of the company’s projects outside of Los Angeles had its permits voided in a court ruling that also blocked battery storage development in unincorporated areas outside the city.
Third, and potentially most significant for energy developers in New York City: Swiftsure’s death will almost certainly embolden the anti-storage activist movement.
Curtis Sliwa, the Republican nominee in next week’s New York mayoral election, was one of many local politicians who opposed Swiftsure and rallied with residents close to the proposed site in May. He’s part of a broader trend of Republican politicians becoming skeptical of battery storage sites near where people live and work, including in Democrat-ruled New York.
Putting batteries in the five boroughs has always been a challenge, but January’s Moss Landing battery fire in California created a PR frenzy in the city, as conservative figures seized on the online panic created by the blaze. Once-agnostic GOP members of Congress from New York City are now anti-battery storage in their backyards, including Anthony D’Esposito, Nicole Malliotakis and Mike Lawler. Trump’s Environmental Protection Agency administrator, Lee Zeldin — a former NYC congressman — is now weighing in against individual battery projects on Long Island and Staten Island.
Swiftsure was proposed in 2023 and permitted by the state last year. Fullmark was given a deadline of this spring to submit routine paperwork demonstrating how it would comply with conditions of the site’s permit, including how the battery storage project would be decommissioned. In August, the New York Department of Public Service gave Fullmark an extension until October 11.
Instead of meeting that October deadline, it seems Fullmark quietly withdrew its Swiftsure proposal.
It’s unclear how Democrat Zohran Mamdani or independent Andrew Cuomo would handle the rise of the anti-battery movement if either of them wins the November 4 mayoral election. That’s partially because energy policy and climate change have been non-issues in the campaign, saving small mentions of nuclear power, heat pumps, or gas prices in one-off debate answers or social media posts.
Sliwa, who has referred to Swiftsure as a “mini Chernobyl,” told me that he anticipates this victory will lead to more protests at more battery sites, no matter who wins the mayoral election. “The cancellation of this lithium-ion battery warehouse will reverberate throughout the boroughs,” Sliwa told me Monday. “It’ll be a rallying cry [because] it’s not a fait accompli that these facilities will be complete and operational.”
The Mamdani and Cuomo campaigns did not respond to requests for comment on Swiftsure’s cancellation.
On China’s rare earths, Bill Gates’ nuclear dream, and Texas renewables
Current conditions: Hurricane Melissa exploded in intensity over the warm Caribbean waters and has now strengthened into a major storm, potentially slamming into Cuba, the Dominican Republic, Haiti, and Jamaica as a Category 5 in the coming days • The Northeast is bracing for a potential nor’easter, which will be followed by a plunge in temperatures of as much as 15 degrees Fahrenheit lower than average • The northern Australian town of Julia Creek saw temperatures soar as high as 106 degrees.
Exxon Mobil filed a lawsuit against California late Friday on the grounds that two landmark new climate laws violate the oil giant’s free speech rights, The New York Times reported. The two laws would require thousands of large companies doing business in the state to calculate and report the greenhouse gas pollution created by the use of their products, so-called Scope 3 emissions. “The statutes compel Exxon Mobil to trumpet California’s preferred message even though Exxon Mobil believes the speech is misleading and misguided,” Exxon complained through its lawyers. California Governor Gavin Newsom’s office said the statutes “have already been upheld in court and we continue to have confidence in them.” He condemned the lawsuit, calling it “truly shocking that one of the biggest polluters on the planet would be opposed to transparency.”
China will delay introducing export controls on rare earths, an unnamed U.S. official told the Financial Times following two days of talks in Malaysia. For years, Beijing has been ratcheting up trade restrictions on the global supply of metals its industry dominates. But this month, China slapped the harshest controls yet on rare earths. In response, stocks in rare earth mining and refining companies soared. Despite what Heatmap’s Matthew Zeitlin called the “paradox of Trump’s critical mineral crusade” to mine even as he reduced demand from electric vehicle factories, “everybody wants to invest in critical minerals startups,” Heatmap’s Katie Brigham wrote. That — as frequent readers of this newsletter will recall — includes the federal government, which under the Trump administration has been taking equity stakes in major projects as part of deals for federal funding.
The Nuclear Regulatory Commission rewarded Bill Gates’ next-generation reactor company, TerraPower, with its final environment impact statement last week. The next step in the construction permit process is a final safety evaluation that the company expects to receive by the end of this year. If everything goes according to plan, TerraPower could end up winning the race to build the nation’s first commercial reactor to use a coolant other than water, and do so at a former coal-fired plant in the country’s top coal-producing state. “The Natrium plant in Wyoming, Kemmerer Unit 1, is now the first advanced reactor technology to successfully complete an environmental impact statement for the NRC, bringing us another step closer to delivering America’s next nuclear power plant,” said TerraPower president and CEO Chris Levesque.
A judge gave New York Governor Kathy Hochul’s administration until February 6 to issue rules for its long-delayed cap-and-invest program, the Albany Times-Union reported. The government was supposed to issue the guidelines that would launch the program as early as 2024, but continuously pushed back the release. “Early outlines of New York’s cap and invest program indicate that regulators were considering a relatively low price ceiling on pollution, making it easier for companies to buy their way out of compliance with the cap,” Heatmap’s Emily Pontecorvo wrote in January.

The Texas data center boom is being powered primarily with new wind, solar, and batteries, according to new analysis by the Energy Information Administration. Since 2021, electricity demand on the independent statewide grid operated by the Electric Reliability Council of Texas has soared. Over the past year, wind, solar, and batteries have been supplying that rising demand. Utility-scale solar generated 45 terawatt-hours of electricity in the first nine months of 2025. That’s 50% more than the same period in 2024 and nearly four times more than the same period in 2021. Wind generation, meanwhile, totaled 87 terawatt-hours for the first nine months of this year, up 4% from last year and 36% since 2021. “Together,” the analysis stated, “wind and solar generation met 36% of ERCOT’s electricity demand in the first nine months of 2025.”