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The bugs are already out in New York and the West is in for ”a very bad spring.” Here’s what experts say is in store for the U.S. this year.
It got me in March.
Maybe it happened while I was on a run, enjoying one of the first warm days of spring. Maybe I’d been waiting unsuspectingly for the train on an open-air platform. Maybe it happened in my own apartment. Regardless, at some point last month, I hesitated too long before brushing away a soft, fleeting sensation on my cheek. In the ongoing, 10,000-year-long game of tag between mosquitoes and humans, I’d taken another L.
Though it’s only early April, many New Yorkers have already gotten their first bites of the year: interviewer Isaac Fitzgerald and interviewee James Hannaham were driven out of a backyard by the bugs in Brooklyn; the city’s Department of Health has officially declared “it’s mosquito season in NYC!” and started tweeting out standing-water advisories; and CBS’ local affiliate recently ran a segment about how “it’s going to be a bad summer” for biting insects. Other metropolitan areas are also bracing for a buggy season ahead: “It’s looking like it’s going to be worse than it has [been in] the past two years,” Minnesota’s MPR News reports. “Epic rains expected to take one more swat at California, with masses of mosquitoes,” adds the Los Angeles Times. “We could possibly see more mosquitoes than we wanted to see,” a biologist warned the Ohio area.
Predicting the severity of mosquito season is a bit of an imprecise science, like trying to nail down a long-range weather forecast. Actually, it’s a lot like trying to nail down a long-range weather forecast, since mosquito populations fluctuate based on immediate and unreliable conditions, like spring rainfall and small changes in temperature. Generally speaking, more rain tends to precede “a greater prevalence of mosquitoes within the same month,” while “hotter temperatures [are] associated with increases in mosquitoes one to two months later,” reports one study, which focused on Dengue-carrying Aedes mosquitoes in Sri Lanka. (Invasive Aedes mosquitoes are also found on both U.S. coasts and throughout the South, with their habitats shifting north toward Chicago due to climate change.)
Mosquitos require standing water and temperatures steadily above 50 degrees Fahrenheit in order to start their breeding cycles. In the western United States, in addition to spring rainfall, natural occurrences of standing water are created by snowmelt, which causes floods that dry into perfect mosquito-breeding pools. Snowpack in the West, then, is one of the best early determinants of the coming mosquito season — unfortunate news for Californians, since their state broke a 40-year snowfall record over the winter. “Many places out west where they’ve received record rainfall and snowfall, they’re likely to have a very bad spring,” Daniel Markowski, the technical director of the American Mosquito Control Association, told Heatmap.
Snowmelt can also be a determining factor in the Midwest and East, where fears of spring flooding are already high. That said, their spring mosquito seasons are “less dependent upon the snow” than the West since they “always get at least some snow in many of the same areas,” Markowski went on. The bigger variable for the region is spring rainfall and how early it gets warm.
Mixed news on that front: NOAA expects the East Coast to be warmer than usual from April through June, with above-average precipitation concentrated around the Great Lakes region and potentially stretching south and seaward, through Pennsylvania, New York City, and the D.C.-area. Though the severity of the coming mosquito season is thus still a bit of an unknown, the stakes are high: Last year saw the largest number of ever recorded West Nile virus-positive mosquito pools in New York City, resulting in four deaths. There’s every indication that could happen again in 2023: “We expect mosquito and tick activity in NYC to be at similarly high levels,” M&M Pest Control, a Long Island City-based exterminator, writes on their website.
Warmer temperatures in the south and east could mean earlier emergences of mosquitoes.NOAA
Rainfall in most of the United States is expected to be normal this spring, but potential damp conditions around the Great Lakes and southern Acela Corridor could increase mosquito populations.NOAA
In the South, mosquito populations are “almost all rainfall- and temperature-driven” because snow is not the primary cause of standing water in the region, according to Markowski. While temperatures might not yet be high enough in the region for a major larvae boom, recent storms have authorities “concerned right now in southeast Mississippi, Alabama, Arkansas, Tennessee about mosquito populations,” Markowski said. Not to mention another reason for the South to be on high alert: Culex lactator, a species of mosquito native to South and Central America, has been discovered spreading throughout southwest Florida. Though it hasn’t been extensively studied, we do know Culex is a potential vector for West Nile and St. Louis Encephalitis.
Of especially high concern for infectious disease experts this year will be a place not usually thought of for its mosquitoes: Phoenix’s Maricopa County. Back in 2021, the region experienced the largest single outbreak of West Nile virus in U.S. history, likely due to a wetter-than-average monsoonal season; statewide, 127 people died. This year, winter snowmelt and spring rains have pulled the region out of its drought, but once the floodwaters start to recede, they’ll create major mosquito breeding grounds, NBC’s 12 News reports. The wetter desert environment will also attract more birds — the natural hosts of West Nile virus.
So while there is no guarantee that 2023 is going to be another “monster mosquito season” for the U.S. like 2021, there is no guarantee it won’t be, either. We know the West is unusually wet, which will almost certainly mean more bugs, while the Midwest and East are likewise tracking warm and damp. In the South, where storms are one of the biggest causes of standing water, there are fears that this year’s record number of early-season tornadoes is only a “prelude” of what’s to come.
That makes it all the more important to minimize mosquitoes where we do have some control: “What I try to get people to understand is, just as nature — rainfall, snowfall amounts; temperatures — impact mosquito problems, we have a lot of control over what bites us in our backyards,” Markowski said. “If we’re over-watering our property, or we’re allowing water to stand on our property, you’re making mosquitoes right there that bite you.”
Meanwhile, in New York City, the warmest days of the year so far are expected this week. Short-sleeved, sun-starved urbanites will be out in droves.
As will be mosquitoes.
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Rob and Jesse talk with John Henry Harris, the cofounder and CEO of Harbinger Motors.
You might not think that often about medium-duty trucks, but they’re all around you: ambulances, UPS and FedEx delivery trucks, school buses. And although they make up a relatively small share of vehicles on the road, they generate an outsized amount of carbon pollution. They’re also a surprisingly ripe target for electrification, because so many medium-duty trucks drive fewer than 150 miles a day.
On this week’s episode of Shift Key, Rob and Jesse talk with John Henry Harris, the cofounder and CEO of Harbinger Motors. Harbinger is a Los Angeles-based startup that sells electric and hybrid chassis for medium-duty vehicles, such as delivery vans, moving trucks, and ambulances.
Rob, John, and Jesse chat about why medium-duty trucking is unlike any other vehicle segment, how to design an electric truck to last 20 years, and how President Trump’s tariffs are already stalling out manufacturing firms. Shift Key is hosted by Jesse Jenkins, a professor of energy systems engineering at Princeton University, and Robinson Meyer, Heatmap’s executive editor.
Subscribe to “Shift Key” and find this episode on Apple Podcasts, Spotify, Amazon, YouTube, or wherever you get your podcasts.
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Here is an excerpt from our conversation:
Robinson Meyer: What is it like building a final assembly plant — a U.S. factory — in this moment?
John Harris: I would say lots of people talk about how excited they are about U.S. manufacturing, but that's very different than putting their money where their mouth is. Building a final assembly line, like we have — our team here is really good, that they made it feel not that hard. The challenge is the whole supply chain.
If we look at what we build here in-house at Harbinger, we have a final assembly line where we bolt parts together to make chassis. We also have two sub-component assembly lines where we take copper and make motors, and where we take cells and make batteries. All three of those lines work pretty well. We're pumping out chassis, and they roll out the door, and we sell them to people, which is great. But it’s all the stuff that goes into those, that's the most challenging. There's a lot of trade policy at certain hours of the day, on certain days of the week — depending on when we check — that is theoretically supposed to encourage us manufacturing.
But it's really not because of the volatility. It costs us an enormous amount to build the supply chain, to feed these lines. And when we have volatile trade policy, our reaction, and everyone else's reaction, is to just pause. It’s not to spend more money on U.S. manufacturing, because we were already doing that. We were spending a lot on U.S. manufacturing as part of our core approach to manufacturing.
The latest trade policy has caused us to spend less money on U.S. manufacturing — not more, because we're unclear on what is the demand environment going to be, what is the policy going to be next week? We were getting ready to make major investments to take certain manufacturing tasks in our supply chain out of China and move them to Mexico, for example. Now we’re not. We were getting ready to invest in certain kinds of automation to do things in house, and now we're waiting. So the volatility is dramatically shrinking investment in US manufacturing, including ours.
Meyer: And can you just explain, why did you make that decision to pause investment and how does trade policy affect that decision?
Harris: When we had 25% tariffs on China, if we take content out of China and move it to Mexico, we break even — if that. We might still end up underwater. That's because there's better automation in China. There's much higher labor productivity. And — this one is always shocking to people — there’s lower logistics costs. When we move stuff from Shenzhen to our factory, in many cases it costs us less than moving shipments from Monterey.
Mentioned:
CalStart’s data on medium-duty electric trucks deployed in the U.S.
Here’s the chart that John showed Rob and Jesse:
Courtesy of Harbinger
It draws on data from Bloomberg in China, the ICCT, and the Calstart ZET Dashboard in the United States.
Jesse’s case for EVs with gas tanks — which are called extended range electric vehicles
On xAI, residential solar, and domestic lithium
Current conditions: Indonesia has issued its highest alert level due to the ongoing eruption of Mount Lewotobi Laki-laki • 10 million people from Missouri to Michigan are at risk of large hail and damaging winds today • Tropical Storm Erick, the earliest “E” storm on record in the eastern Pacific Ocean, could potentially strengthen into a major hurricane before making landfall near Acapulco, Mexico, on Thursday.
The NAACP and the Southern Environmental Law Center said Tuesday that they intend to sue Elon Musk’s artificial intelligence company xAI over alleged Clean Air Act violations at its Memphis facility. Per the lawsuit, xAI failed to obtain the required permits for the use of the 26 gas turbines that power its supercomputer, and in doing so, the company also avoided equipping the turbines with technology that would have reduced emissions. “xAI’s turbines are collectively one of the largest, or potentially the largest, industrial source of nitrogen oxides in Shelby County,” the lawsuit claims.
The SELC has additionally said that residents who live near the xAI facility already face cancer risks four times above the national average, and opponents have argued that xAI’s lack of urgency in responding to community concerns about the pollution is a case of “environmental racism.” In a statement Tuesday, xAI responded to the threat of a lawsuit by claiming the “temporary power generation units are operating in compliance with all applicable laws,” and said it intends to equip the turbines with the necessary technology to reduce emissions going forward.
Shares of several residential solar companies plummeted Tuesday after the Senate Finance Committee declined to preserve related Inflation Reduction Act investment tax credits. As my colleague Matthew Zeitlin reported, Sunrun shares fell 40%, “bringing the company’s market cap down by almost $900 million to $1.3 billion,” after a brief jump at the end of last week “due to optimism that the Senate Finance bill might include friendlier language for its business model.”
That never materialized. Instead, the Finance Committee’s draft proposed terminating the residential clean energy tax credit for any systems, including residential solar, six months after the bill is signed, as well as the investment and production tax credits for residential solar. SolarEdge and Enphase also suffered from the news, with shares down 33% and 24%, respectively. You can read Matthew’s full analysis here.
Chevron announced Tuesday that it has acquired 125,000 net acres of the Smackover Formation in southwest Arkansas and northeast Texas to get into domestic lithium extraction. Chevron’s acquisition follows an earlier move by Exxon Mobil to do the same, with lithium representing a key resource for the transition from fossil fuels to renewable energy sources “that would allow the company to pivot if oil and gas demands wane in the coming decades,” Bloomberg writes.
“Establishing domestic and resilient lithium supply chains is essential not only to maintaining U.S. energy leadership but also to meeting the growing demand from customers,” Jeff Gustavson, the president of Chevron New Energies, said in a Tuesday press release. The Liberty Owl project, which was part of Chevron’s acquisition from TerraVolta Resources, is “expected to have an initial production capacity of at least 25,000 tonnes of lithium carbonate per year, which is enough lithium to power about 500,000 electric vehicles annually,” Houston Business Journal reports.
The Federal Emergency Management Agency prepared a memo titled “Abolishing FEMA” at the direction of Homeland Security Secretary Kristi Noem, describing how its functions can be “drastically reformed, transferred to another agency, or abolished in their entirety” as soon as the end of 2025. While only Congress can technically eliminate the agency, the March memo, obtained and reviewed by Bloomberg, describes potential changes like “eliminating long-term housing assistance for disaster survivors, halting enrollments in the National Flood Insurance Program, and providing smaller amounts of aid for fewer incidents — moves that by design would dramatically limit the federal government’s role in disaster response.”
In May, FEMA’s acting administrator, Cameron Hamilton, was fired one day after defending the existence of the department he’d been appointed to oversee when testifying before the House Appropriations subcommittee. An internal FEMA memo from the same month described the agency’s “critical functions” as being at “high risk” of failure due to “significant personnel losses in advance of the 2025 Hurricane Season.” President Trump has, on several occasions, expressed a desire to eliminate FEMA, as recommended by the Project 2025 playbook from the Heritage Foundation. The March “Abolishing FEMA” memo “just means you should not expect to see FEMA on the ground unless it’s 9/11, Katrina, Superstorm Sandy,” Carrie Speranza, the president of the U.S. council of the International Association of Emergency Managers, told Bloomberg.
The Spanish government on Tuesday released its report on the causes of the April 28 blackout that left much of the nation, as well as parts of Portugal, without power for more than 12 hours. Ecological Transition Minister Sara Aagesen, who heads Spain’s energy policy, told reporters that a voltage surge in the south of Spain had triggered a “chain reaction of disconnections” that led to the widespread power loss, and blamed the nation’s state-owned grid operator Red Eléctrica for “poor planning” and failing to have enough thermal power stations online to control the dynamic voltage, the Associated Press reports. Additionally, Aagesen said that utilities had preventively shut off some power plants when the disruptions started, which could have helped the system stay online. “We have a solid narrative of events and a verified explanation that allows us to reflect and to act as we surely will,” Aagesen went on, responding to criticisms that Spain’s renewable-heavy energy mix was to blame for the blackout. “We believe in the energy transition and we know it’s not an ideological question but one of this country’s principal vectors of growth when it comes to re-industrialisation opportunities.”
Metrograph
“It seems that with the current political climate, with the removal of any reference to climate change on U.S. government websites, with the gutting of environmental laws, and the recent devastating fires in Los Angeles, this trilogy of films is still urgently relevant.” —Filmmaker Jennifer Baichwal on the upcoming screenings of the Anthropocene trilogy, co-created with Nicholas de Pencier and photographer Edward Burtynsky between 2006 and 2018, at the Metrograph in New York City.
Shares in Sunrun, SolarEdge, and Enphase are collapsing on the Senate’s new mega-bill draft.
The residential solar rescue never happened. Shares in several residential solar companies plummeted Tuesday as the market reacted to the Senate Finance Committee’s reconciliation language, which maintains the House bill’s restriction on investment tax credits for residential solar installers and its scrapping of the tax credit for homeowners who buy their own systems.
The Solar Energy Industries Association, a solar trade group, criticized the Senate text, saying that it had only “modest improvements on several provisions” and would “pull the plug on homegrown solar energy and decimate the American manufacturing renaissance.”
Sunrun shares fell 40% Tuesday, bringing the company’s market cap down by almost $900 million to $1.3 billion, a comparable loss in value to what it sustained the day after the passage of the House reconciliation bill. The stock price had jumped up late last week due to optimism that the Senate Finance bill might include friendlier language for its business model.
Instead the Finance Committee proposal would terminate the residential clean energy tax credit for any systems, including residential solar, six months after the bill is signed. The text also zeroes out investment and production tax credits for residential solar when “the taxpayer rents or leases such property to a third party,” a common arrangement in the industry pioneered by Sunrun.
Sunrun’s third party ownership model well predates the Inflation Reduction Act and is about as old as the company itself, which was founded in 2007. The company had been claiming investment tax credits for solar before the IRA made them tech neutral. The company began securitizing solar deals in 2015 and in a 2016 securities filling, the company said that it had six deals where investors would be able to garner the lease payments and investment tax credits.
“Ain’t no sunshine for resi,” Jefferies analyst Julien Dumoulin-Smith wrote in a note to clients on Tuesday. “Overall, we view Senate's version as a negative” for Sunrun, as well as SolarEdge and Enphase, the residential solar equipment companies, whose shares are down by about 33% and 24% respectively.
“If this language is not adjusted before the bill passes the Senate floor,” Morgan Stanley analyst Andrew Perocco wrote in a note to clients, “we believe Sunrun, SolarEdge, and Enphase will trade towards our bear cases.”
Morgan Stanley had earlier estimated that cutting off home solar from tax credits would lead to a “85% contraction in residential solar volumes” due, in many cases, to solar products no longer resulting in savings on electricity bills.
That’s because the ability to lease solar equipment (or have homeowners sign power purchase agreements) and then claim tax credits sits at the core of the contemporary residential solar model.
“Our core solar service offerings are provided through our lease and power purchase agreements,” the company said in its 2024 annual report. “While customers have the option to purchase a solar energy system outright from us, most of our customers choose to buy solar as a service from us through our Customer Agreements without the significant upfront investment of purchasing a solar energy system.”
This means that to claim tax credits for the projects, they have to be investment tax credits, not home energy credits. These credits play a role in Sunrun’s extensive business raising money from investors to finance solar projects, which can then be partially monetized via tax credits.
Fund investors “can receive attractive after-tax returns from our investment funds due to their ability to utilize Commercial ITCs,” the company said in its report. The financing then “enables us to offer attractive pricing to our customers for the energy generated by the solar energy system on their homes.”
Without the ability to claim investment tax credits, Sunrun could be left having to charge higher prices to homeowners and face a higher cost of capital to raise money from investors.
“Last night’s draft text confirms the Senate intends to abruptly repeal tax credits available to homeowners who want to go solar – effectively increasing costs and limiting choice for countless Americans,” Chris Hopper, chief executive of Aurora Solar, said in an emailed statement.