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The Boston Marathon is in three days. The weather forecast this year has been notably chaotic.

The second Saturday of April is the most important weather-related day on New England’s calendar, if not America’s.
The reason? It’s when Boston Marathon Monday finally appears in the 10-day forecast.
Running a marathon is one of the most difficult and grueling challenges in sports; athletes spend months logging hundreds of cumulative miles and dodging injuries in preparation for the big event. And for amateur runners who don’t have an Olympic Games in their cards, Boston is the race — with a tightly competitive field of 30,000 participants, it’s the oldest and most iconic marathon in the world.
Which is why one bad window of weather can ruin everything.
Take 2018, when torrential rain and temperatures in the 30s led more than half of the professional field to drop out. Or 2012, when 4,000 entrants opted to defer their race rather than run in the blazing 89-degree heat. Or 2007, when runners had to face 30-mile-per-hour headwinds and sleet on a course abandoned by no-show volunteers.
So what’s it going to be this year? When the forecast was first announced on Saturday, it was all of the above.
The weather reports leading up to the 2023 marathon, which takes place this coming Monday, have induced a lot of whiplash. Depending on the timing of a weekend storm, runners have been told they will either face “the challenge of rain and gusty winds” on Monday — or, “if the storm front slows down … a very warm and humid day,” Time Out writes. Those would be two very different races and in addition to complicating packing, the uncertainty added another level of anxiety for runners who have nothing better to do than refresh the forecast during tapering. (The latest forecasts have since calmed down a bit.)
Boston is already one of the most meteorologically unpredictable cities in the country and climate change is making reliable forecasts even harder. Future marathon forecasts in particular will be prone to more of the will-it-be-hot-or-cold? back and forth as the warm jet stream and cold Canadian air flip influence over New England in the spring. “Some evidence indicates that the atmosphere may become more ‘wavy’” as the climate continues to warm “and thus these sorts of temperature swings could occur more often,” Adam Schlosser, a senior research scientist at the MIT Center for Global Change Science, told The Boston Globe last year.
The ideal forecast for a marathon is overcast with a temperature of 43.2 degrees Fahrenheit (or slightly colder for elites). But Boston, which has had an average start temperature of 56 degrees over the past 22 years, is getting hotter. In a 2017 Climate.gov study of the Massachusetts Climate Division (which includes Boston), the average maximum temperature was observed to have risen at a rate of 0.3 degrees per decade since 1897, the year of the first race — “more than double the temperature rise recorded for the contiguous United States as a whole (0.12 degrees per decade).” In the last 30 years, that warming has more than tripled, “ranging from 1.0 degree to 1.3 degrees per decade in the Boston area, depending on the exact start and end year you use to calculate the trend.”

Similarly, a 2012 study published in PLOS One found that Boston proper is now “about 4 degrees warmer on average in the spring than it was in the 1890s … due to a combination of global warming and the urban heat island effect associated with large cities.” With the caveat that Beantown’s spring weather can be all over the map in any given year, the researchers further found that if “Boston temperatures were to continue to warm by 4.5 degrees by the end of the century (a mid-range estimate for global warming), there will be a 64% chance that winning times will be slowed” due to the effects of heat on strenuous physical performance.
Race organizers have already taken measures to make conditions safer for athletes; in 2007, the marathon start time was bumped back from noon to 10 a.m., in part to limit exposure to the highest midday temperatures. Still, “the next few decades will tell whether morning start times and heat warnings will be enough to keep winning marathon runners from slowing in a steadily warming world,” Boston University biology professor Dr. Richard B. Primack, who led the study, wrote.
This year, at least, runners can probably relax a little: The latest forecast shows the high topping out at 60 degrees on Monday, with a start temperature of 45 degrees in Hopkinton at 9 a.m. Though there’s a chance of light showers, there is also the possibility of a “helpful” wind on runners’ backs.
You might even call it a perfect spring day. Phew.
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A trio of powerful climate hawks are throwing their weight against the SPEED Act.
Key Senate Democrats are opposing a GOP-led permitting deal to overhaul federal environmental reviews without assurances that clean energy projects will be able to reap the benefits. Winning these lawmakers’ support will require major concessions to build new transmission infrastructure and greater permitting assistance for renewable energy projects.
In an exclusive joint statement provided Tuesday to Heatmap News, Senate Energy and Natural Resources ranking member Martin Heinrich, Environment and Public Works ranking member Sheldon Whitehouse, and Hawaii senator Brian Schatz came out against passing the SPEED Act, a bill that would change the National Environmental Policy Act, citing concerns about how it would apply to renewable energy and transmission development priorities.
“We are committed to streamlining the permitting process — but only if it ensures we can build out transmission and cheap, clean energy. While the SPEED Act does not meet that standard, we will continue working to pass comprehensive permitting reform that takes real steps to bring down electricity costs,” the statement read.
As I wrote weeks ago, there’s very little chance the SPEED Act could become law without addressing Senate climate hawks’ longstanding policy preferences. Although the SPEED Act was voted out of committee in the House two weeks ago with support from a handful of Democratic lawmakers, it has yet to win support from even moderate energy wonks in that legislative body, including Representative Scott Peters, one of the Democratic House negotiators in bipartisan permitting talks. Peters told me he would need to see more assurances dealing with the renewables permitting freeze, for example, in order for him to support the bill.
Observers had initially expected a full House vote on the SPEED Act as soon as this week, but an additional hurdle arose in recent days in the form of opposition from House conservative Republicans, led by Representative Chip Roy. The congressman from Texas had requested additional federal actions targeting renewables projects in exchange for passage of the One Big Beautiful Bill Act, which effectively repealed the Inflation Reduction Act. What followed was a set of directives from the Interior Department that all but halted federal solar and wind permitting. Roy’s frustration with the SPEED Act concerns a relatively milquetoast nod to renewables permitting problems that would block presidents from rescinding already issued permits. This upset appears to have delayed a vote on the bill in the House.
There’s an eerie familiarity to this moment: Almost exactly one year ago, the last major attempt at a permitting deal, authored by Senators Joe Manchin and John Barrasso, died when then-Majority Leader Chuck Schumer declined to bring it up for a vote in the face of opposition from the House. Unlike the SPEED Act, that bill offered changes to transmission siting policy that even conservative estimates said would’ve hastened the pace of national decarbonization.
Having Schatz, Heinrich, and Whitehouse — the three most powerful climate hawks in Congress — throw their weight against the SPEED Act casts serious doubt on the prospects for that legislation becoming the permitting deal this Congress. It also exposes an intra-energy world conflict, as it appears to position these lawmakers in opposition to American Clean Power, an energy trade group that represents a swath of diversified energy companies and utilities, as well as solar, wind, and battery storage developers.
Last week, ACP joined with the American Petroleum Institute and gas pipeline advocacy organizations to urge Congress to pass the SPEED Act. In a letter to House Speaker Mike Johnson and Minority Leader Hakeem Jeffries, ACP and the fossil fuel industry trade groups said that the legislation “directly addresses” the challenges facing their interests and “represents meaningful bipartisan progress toward a more stable and dependable permitting framework.” The only reference to potential additions came in a single, vague line: “While the SPEED Act makes important progress, there are additional ways Congress can facilitate the development of reliable and affordable energy infrastructure as part of a broader permitting package.”
This letter was taken by some backers of the renewable energy industry to be an endorsement without concessions. It was also a surprise because just days earlier, American Clean Power responded to the bill’s passage with a vaguely supportive statement that declared “additional efforts” were needed for “transmission infrastructure,” without which “energy prices will spike and system reliability will be threatened.” (It’s worth noting that the committee behind the SPEED Act, House Natural Resources, has no authority over transmission siting. No other proposal has yet emerged from Republicans in that chamber for Republicans to address the issue, either.)
One of the renewables backers taken aback was Schatz, who took to X to sound off against the organization. “Congratulations to ‘American Clean Power’ for cutting a deal with the American Petroleum Institute, but to enact a law both the house and the Senate have to agree, and Senators are finding out about this for the first time,” Schatz wrote in a post, which Whitehouse retweeted from one of his official X accounts.
In a subsequent post, Schatz said: “I am not finding out about the bill’s existence for the first time, I am tracking it all very closely. I am finding out that ACP endorsed it as is without anything on transmission, for the first time.”
By contrast, the statement from the three senators aligns them with the Solar Energy Industries Association, which sent a letter from more than 140 solar companies to top congressional leaders requesting direct action to fix a bureaucratic freeze on permit-related activity that has already helped kill large projects, including Esmeralda 7, which was the largest solar mega-farm in the United States.
In its message to Congress, the trade association made plain that while the SPEED Act was a welcome form of permitting changes, it was nowhere close to dealing with Trumpian chicanery on the group’s priority list.
We’ll have more on this unfolding drama in the days to come.
One longtime analyst has an idea to keep prices predictable for U.S. businesses.
What if we treated lithium like oil? A commodity so valuable to the functioning of the American economy that the U.S. government has to step in not only to make it available, but also to make sure its price stays in a “sweet spot” for production and consumption?
That was what industry stalwart Howard Klein, founder and chief executive of the advisory firm RK Equities, had in mind when he came up with his idea for a strategic lithium reserve, modeled on the existing Strategic Petroleum Reserve.
Klein published a 10-page white paper on the idea Monday, outlining an expansive way to leverage private companies and capital markets to develop a non-Chinese lithium industry without the risk and concentrated expense of selecting specific projects and companies.
The lithium challenge, Klein and other industry analysts and executives have long said, is that China’s whip hand over the industry allows it to manipulate prices up and down in order to throttle non-Chinese production. When investment in lithium ramps up outside of China, Chinese production ramps up too, choking off future investment by crashing prices.
Recognizing the dangers stemming from dysfunction in the global lithium market constitutes a rare area of agreement between both parties in Washington and across the Biden and Trump administrations. Last year, a Biden State Department official told reporters that China “engage[s] in predatory pricing” and will “lower the price until competition disappears.”
A bipartisan investigation released last month by the House of Representatives’ Select Committee on Strategic Competition between the United States and the Chinese Communist Party found that “the PRC engaged in a whole‐of‐government effort to dominate global lithium production,” and that “starting in 2021, the PRC government engaged in a coordinated effort to artificially depress global lithium prices that had the effect of preventing the emergence of an America‐focused supply chain.”
Klein thinks he’s figured out a way to deal with this problem
“They manipulated and they crushed prices through oversupply to prevent us from having our own supply chains,” he told me.
It’s not just that China can keep prices low through overproduction, it’s also that the country’s enormous market power can make prices volatile, Klein said, which scares off private sector investment in mining and processing. “You have two years, up two years down, two years up, two years down,” he told me. “That’s the problem we’re trying to solve.
His proposal is to establish “a large, rules-based buffer of lithium carbonate — purchased when prices are depressed due to Chinese oversupply, and released during price spikes, shortages, or export restrictions.”
This reserve, he said, would be more than just a stockpile from which lithium could be released as needed. It would also help to shape the market for lithium, keeping prices roughly in the range of $20,000 per ton (when prices fall below that, the reserve would buy) and $40,000 to $50,000 per ton, when the reserve would sell. The idea is to keep the price of lithium carbonate — which can be processed as a material for batteries with a wide range of defense (e.g. drones) and transportation (e.g. electric vehicles) applications — within a range that’s reasonable for investors and businesses to plan around.
“Lithium has swung from like $6,000 [per ton] to $80,000, back down to $9,000, and now it’s at $11,000 or $12,000,” Klein told me. “But $11,000 or $12,000 is not a high enough price for a company to build a plan that’s going to take three to five years. They need $20,000 to $25,000 now as a minimum for them to make a $2 billion dollar investment.” When prices for lithium get up to “$50,000, $60,000, or $70,000, then it becomes a problem because battery makers can’t make money.”
Both the Biden and Trump administrations have taken more active steps to secure a U.S. or allied supply chain for valuable inputs, including rare earth metals. But Klein’s proposed reserve looks to balance government intervention with a diverse, private-sector led industry.
The reserve would be more broad-based than price floor schemes, where a major buyer like the Defense Department guarantees a minimum price for the output from a mine or refining facility. This is what the federal government did in its deal with MP Materials, the rare earths miner and refiner, which secured a multifaceted deal with the federal government earlier this year.
Klein estimates that the cost in the first year of the strategic lithium reserve could be a few billion dollars — on the scale of the nearly $2.3 billion loan provided by the Department of Energy for the Thacker Pass mine in Nevada, which also saw the federal government take an equity stake in the miner, Lithium Americas.
Ideally, Klein told me, “there’s a competition of projects that are being presented to prospective funders of those projects, and I want private market actors to decide, should we build more Thacker Passes or should we do the Smackover?” referring to a geologic formation centered in Arkansas with potentially millions of tons of lithium reserves.
Klein told me that he’s trying to circulate the proposal among industry and policy officials. His hoped is that as the government attempts to come up with a solution to Chinese dominance of the lithium industry, “people are talking about this idea and they’re saying, Oh, that’s actually a pretty good idea.”
Current conditions: After a two-inch dusting over the weekend, Virginia is bracing for up to 8 inches of snow • The Bulahdelah bushfire in New South Wales that killed a firefighter on Sunday is flaring up again • The death toll from South and Southeast Asia’s recent floods has crossed 1,750.

President Donald Trump’s Day One executive order directing agencies to stop approving permitting for wind energy projects is illegal, a federal judge ruled Monday evening. In a 47-page ruling against the president in the U.S. District Court for the District of Massachusetts, Judge Patti B. Saris found that the states led by New York who sued the White House had “produced ample evidence demonstrating that they face ongoing or imminent injuries due to the Wind Order,” including project delays that “reduce or defer tax revenue and returns on the State Plaintiffs’ investments in wind energy developments.” The judge vacated the order entirely.
Trump’s “total war on wind” may have shocked the industry with its fury, but the ruling is a sign that momentum may be shifting. Wind developers have gathered unusual allies. As I wrote here in October, big oil companies balked at Trump’s treatment of the wind industry, warning the precedents Republican leaders set would be used by Democrats against fossil fuels in the future. Just last week, as I reported here, the National Petroleum Council advised the Department of Energy to back a national permitting reform proposal that would strip the White House of the power to rescind already-granted licenses.
Back in October, I told you about how the head of the world’s biggest metal trading house warned that the West was getting the critical mineral problem wrong, focusing too much on mining and not enough on refining. Now the Energy Department is making $134 million available to projects that demonstrate commercially viable ways of recovering and refining rare earths from mining waste, old electronics, and other discarded materials, Utility Dive reported. “We have these resources here at home, but years of complacency ceded America’s mining and industrial base to other nations,” Secretary of Energy Chris Wright said in a statement.
If you read yesterday’s newsletter, you may recall that the move comes as the Trump administration signals its plans to take more equity stakes in mining companies, following on the quasi-nationalization spree started over the summer when the U.S. military became the largest shareholder in MP Materials, the country’s only active rare earths miner, in a move Heatmap's Matthew Zeitlin noted made Biden-era officials jealous.
NextEra Energy is planning to develop data centers across the U.S. for Google-owner Alphabet as the utility giant pivots from its status as the nation’s biggest renewable power developer to the natural gas preferred by the Trump administration. The Florida-based company already had a deal to provide 2.5 gigawatts of clean energy capacity to Facebook-owner Meta Platforms, and also plans gas plants for oil giant Exxon Mobil Corp. and gas producer Comstock Resources. Still, NextEra’s stock dropped by more than 3% as investors questioned whether the company’s skills with solar and wind can be translated to gas. “They’ve been top-notch, best-in-class renewable developers,” Morningstar analyst Andy Bischof told Bloomberg. “Now investors have to get their head around whether that can translate to best-in-class gas developer.”
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In October, Google backed construction of the first U.S. commercial installation of a gas plant built from the ground up with carbon capture. The project, which Matthew wrote about here, had the trappings to work where other experiments in carbon capture failed. The location selected for the plant already had an ethanol facility with carbon capture, and access to wells to store the sequestered gas. Now the U.S. could have another plant. In a press release Monday, the industrial giant Babcock and Wilcox announced a deal with an unnamed company to supply carbon capture equipment to an existing U.S. power station. More details are due out in March 2026.
Executives from at least 14 fusion energy startups met with the Energy Department on Monday as the agency looks to spur construction of what could be the world’s first power plants to harness the reaction that powers the sun. The Trump administration has made fusion a priority, issuing a roadmap for commercialization and devoting a new office to the energy source, as I wrote in a breakdown of the agency’s internal reorganization last month. It is, as Heatmap’s Katie Brigham has written, “finally, possibly, almost time for fusion” as billions of dollars flow into startups promising to make the so-called energy source of tomorrow a reality in the near future. “It is now time to make an investment in resources to match the nation’s ambition,” the Fusion Industry Association, the trade group representing the nascent industry, wrote in a press release. “China and other strategic competitors are mobilizing billions to develop the technology and capture the fusion future. The United States has invested in fusion R&D for decades; now is the time to complete the final step to commercialize the technology.” Indeed, as I wrote last month, China has forged an alliance with roughly a dozen countries to work together on fusion, and it’s spending orders of magnitude more cash on the energy source than the U.S.
Founded by a former Google worker, the startup Quilt set out to design chic-looking heat pumps sexy enough to serve as decor. Investors like the pitch. The company closed a $20 million Series B round on Monday, bringing its total fundraising to $64 million. “Our growth demonstrates that when you solve for comfort, design, and efficiency simultaneously, adoption accelerates,” Paul Lambert, chief executive and co-founder of Quilt, said in a statement. “This funding enables us to bring that experience to millions more North American homes.”