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Ask any climate wonk what’s holding back clean energy in the U.S. and you’re likely to get the same answer — not enough power lines. But what if the problem isn’t the number of power lines, but rather the outdated metal wires they’re made of?
Restringing transmission lines with more advanced wires, a process known as “reconductoring,” has the potential to double the amount of electricity our existing transmission system can handle, for less than half the price of building new lines. That’s the main finding of a recently published working paper from researchers at the University of California, Berkeley, and Gridlab, an energy consulting firm.
There are a few reasons that something as boring and seemingly ubiquitous as power lines are so crucial to the energy transition. Electrifying our cars and homes will increase demand for electricity, and much of the system is already too congested to integrate new wind and solar power plants. Plus, there just aren’t enough lines that run from the sunniest, windiest places to the places where most people actually live.
To realize the emission reduction potential of the clean energy subsidies in the Inflation Reduction Act, we have to more than double the rate of transmission expansion, according to research from Princeton University’s Repeat Project. Clean energy projects already face major delays and are often hit with exorbitant bills to connect to the grid. A study from Lawrence Berkeley National Laboratory called “Queued Up” found that at the end of 2022, there were more than 10,000 power plant and energy storage projects waiting for permission to connect to the grid — enough to double electricity production in the country. Some 95% of them were zero-carbon resources.
The main problem is permitting. Establishing rights-of-way for new power lines requires extensive environmental review and invites vicious local opposition. People don’t want to look at more wires strung across the landscape. They worry the eyesore will decrease their property value, or that the construction will hurt local ecosystems. New power lines often take upwards of 10 years to plan, permit, and build.
But it’s possible to avoid this time-consuming process, at least in many cases, by simply reconductoring lines along existing rights-of-way. Most of our existing power lines have a steel core surrounded by strands of aluminum. Advanced conductors replace the steel with a lighter but stronger core made of a composite material, such as carbon fiber. This subtle shift in materials and design enables the line to operate at higher temperatures, with less sag, significantly increasing the amount of power it can carry.
Advanced conductors cost two to four times more than conventional power lines — but upgrading an existing line to use advanced conductors can be less than half what a new power line would cost because it eliminates much of the construction spending and fees from permitting for new rights-of-way, the Berkeley study found.
“The most compelling, exciting thing is that it only requires a maintenance permit,” Duncan Callaway, an associate professor of energy and resources at Berkeley and one of the authors said while presenting the research over Zoom last week.
The paper highlights a 2016 project in southeastern Texas. Due to rapid population growth in the area, the local utility, American Electric Power, was seeing higher demand for electricity at peak times than it was prepared for, leading to blackouts. It needed to come up with a solution, fast, and decided that reconductoring 240 miles of its transmission lines would take less time than permitting new ones. The project ended up finishing ahead of schedule and under budget, at a cost of $900,000 per mile. By comparison, the 3,600 miles of new lines built under Texas’ Competitive Renewable Energy Zone program, which were built to connect wind-rich areas to population centers, cost more than double, at an average of $1.9 million per mile.
Callaway and his co-authors also plugged their findings into a power system expansion model — basically a computer program that maps out the most cost-effective mix of technologies to meet regional electric power demand. They fed the model a scenario where the only option for transmission was to build new lines at their slow, historical rate, as well as a scenario where there was also an option to reconductor along existing rights-of-way. The second scenario resulted in nearly four times as much transmission capacity by 2035, enabling the country to achieve a more than 90% clean electric grid by that date.
There are cases where new power lines are needed — for example, to establish a new route to access a high-quality renewable resource, Emilia Chojkiewicz, another author of the study, told me in an email. But she said it nearly always makes sense to consider reconductoring given the potential to double capacity and do so much more quickly. “Unfortunately,” she added, “current transmission planning practices do not tend to incentivize or even consider reconductoring.”
This all seems so ridiculously easy that it begs the question: Why aren’t utilities already rushing to do it? During the webinar last week, Chojkiewicz and her co-authors said part of the problem is just a lack of awareness and comfort with the technology. But the bigger issue is that utilities are not incentivized to look for cheaper, more efficient solutions like reconductoring because they profit off capital spending.
To change this, they suggested that the Federal Energy Regulatory Commission, which oversees interstate transmission, and state public service commissions, which regulate utilities at the state level, mandate the consideration of reconductoring in transmission and resource planning processes, and to properly value the benefits that advanced conductors provide. The Department of Energy could also consider instituting a national conductor efficiency standard, so that all new wires installed, whether along existing rights-of-way or new routes, achieve a minimum level of performance.
Reconductoring isn’t the only no-brainer alternative to building new power lines. Another study from the clean energy think tank RMI published last week illustrates the opportunity with even cheaper tweaks called “grid enhancing technologies.” One option is to install sensors that collect data on wind speed, temperature, and other factors that affect power lines in real time, called dynamic line ratings. These sensors allow utilities to safely increase the amount of power transmitted when weather conditions permit it. There are also power flow controls that can redirect power away from congested lines so that it can be transmitted elsewhere rather than wasted.
RMI found that in the PJM interconnection — a section of the grid in the eastern U.S. that is so congested the grid operator has frozen new applications to connect to it — these grid enhancing technologies could open up more than 6 gigawatts of new capacity to wind, solar, and storage projects in just three years. For reference, in 2022, nearly 300 gigawatts-worth of energy projects were waiting for permission to connect in PJM at the end 2022.
The cost savings are not just theoretical. In 2018, the PJM grid operator determined that a wind farm expansion in Illinois was going to require $100 million of grid upgrades — including building new lines and reconductoring existing ones — over a timeline of about three years before it would be able to connect. The developer countered that the needed upgrades could be achieved through power flow controls, which could be installed for a cost of just $12 million in less than half the time. PJM approved the idea, and the project is currently underway.
Congress is still debating how to reform permitting processes. But while that’s still a necessary step, it’s becoming increasingly clear that there’s a host of other outside-the-box solutions that can be deployed more quickly, in the near term. The IRA may have convinced the environmental movement that building new stuff was worth it, but there are still a lot of cases where the smarter choice is to renovate.
Editor’s note: This story has been updated to correct the cost of adding power flow controls to the PJM interconnection.
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Read our guide to making better, more informed choices in the fight against climate change here.
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.”
The question isn’t whether the flames will come — it’s when, and what it will take to recover.
In the two decades following the turn of the millennium, wildfires came within three miles of an estimated 21.8 million Americans’ homes. That number — which has no doubt grown substantially in the five years since — represents about 6% of the nation’s population, including the survivors of some of the deadliest and most destructive fires in the country’s history. But it also includes millions of stories that never made headlines.
For every Paradise, California, and Lahaina, Hawaii, there were also dozens of uneventful evacuations, in which regular people attempted to navigate the confusing jargon of government notices and warnings. Others lost their homes in fires that were too insignificant to meet the thresholds for federal aid. And there are countless others who have decided, after too many close calls, to move somewhere else.
By any metric, costly, catastrophic, and increasingly urban wildfires are on the rise. Nearly a third of the U.S. population, however, lives in a county with a high or very high risk of wildfire, including over 60% of the counties in the West. But the shape of the recovery from those disasters in the weeks and months that follow is often that of a maze, featuring heart-rending decisions and forced hands. Understanding wildfire recovery is critical, though, for when the next disaster follows — which is why we’ve set out to explore the topic in depth.
The most immediate concerns for many in the weeks following a wildfire are financial. Homeowners are still required to pay the mortgage on homes that are nothing more than piles of ash — one study by the Federal Reserve Bank of Philadelphia found that 90-day delinquencies rose 4% and prepayments rose 16% on properties that were damaged by wildfires. Because properties destroyed in fires often receive insurance settlements that are lower than the cost to fully replace their home, “households face strong incentives to apply insurance funds toward the mortgage balance instead of rebuilding, and the observed increase in prepayment represents a symptom of broader frictions in insurance markets that leave households with large financial losses in the aftermath of a natural disaster,” the researchers explain.
Indeed, many people who believed they had adequate insurance only discover after a fire that their coverage limits are lower than 75% of their home’s actual replacement costs, putting them in the category of the underinsured. Homeowners still grappling with the loss of their residence and possessions are also left to navigate reams of required paperwork to get their money, a project one fire victim likened to having a “part-time job.” It’s not uncommon for fire survivors to wait months or even years for payouts, or to find that necessary steps to rebuilding, such as asbestos testing and dead tree removals, aren’t covered. Just last week, California Governor Gavin Newsom signed a new law requiring insurers to pay at least 60% of a homeowner’s personal property coverage on a total loss without a detailed inventory, up to $350,000. The original proposal called for a 100% payout, but faced intense insurance industry blowback .
Even if your home doesn’t burn to the ground, you might be affected by the aftermath of a nearby fire. In California, a fifth of homes in the highest-risk wildfire areas have lost insurance coverage since 2019, while premiums in those same regions have increased by 42%. Insurers’ jitters have overflowedspilled over into other Western states like Washington, where there are fewer at-risk properties than in California — 16% compared to 41% — but premiums have similarly doubled in some cases due to the perceived hazardrisks.
Some experts argue that people should be priced out of the wildland-urban interface and that managed retreat will help prevent future tragedies. But as I report in my story on fire victims who’ve decided not to rebuild, that’s easier said than done. There are only three states where insured homeowners have the legal right to replace a wildfire-destroyed home by buying a new property instead of rebuilding, meaning many survivors end up shackled to a property that is likely to burn again.
The financial maze, of course, is only one aspect of recovery — the physical and mental health repercussions can also reverberate for years. A study that followed survivors of Australia’s Black Saturday bush fires in 2009, which killed over 170 people, found that five years after the disaster, a fifth of survivors still suffered from “serious mental health challenges” like post-traumatic stress disorder. In Lahaina, two years after the fire, nearly half of the children aged 10 to 17 who survived are suspected of coping with PTSD.
Federal firefighting practices continue to focus on containing fires as quickly as possible, to the detriment of less showy but possibly more effective solutions such as prescribed burns and limits on development in fire-prone areas. Some of this is due to the long history of fire suppression in the West, but it persists due to ongoing political and public pressure. Still, you can find small and promising steps forward for forest management in places like Paradise, where the recreation and park district director has scraped together funds to begin to build a buffer between an ecosystem that is meant to burn and survivors of one of the worst fires in California’s history.
In the four pieces that follow, I’ve attempted to explore the challenges of wildfire recovery in the weeks and months after the disaster itself. In doing so, I’ve spoken to firefighters, victims, researchers, and many others to learn more about what can be done to make future recoveries easier and more effective.
The bottom line, though, is that there is no way to fully prevent wildfires. We have to learn to live alongside them, and that means recovering smarter, too. It’s not the kind of glamorous work that attracts TV cameras and headlines; often, the real work of recovery occurs in the many months after the fire is extinguished. But it also might just make the difference.