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A conversation with Manjula Martin about her new book The Last Fire Season.

When Manjula Martin was growing up in Northern California in the 1980s, wildfires weren’t something she thought about much. She knew about disaster — the magnitude 6.9 Loma Prieta earthquake of 1989, which killed 63 people and injured thousands, hit when she was a teenager — but fire, she thought, was just something that happened up in the mountains in the summer.
Things are different now. In 2017, Martin left the high prices of San Francisco for the redwoods of Sonoma County. The night of their housewarming party, a firestorm swept through Santa Rosa and Sonoma and Napa counties. The next year — 5 years ago this week — the Camp Fire, the deadliest and most destructive fire in the state’s history, destroyed the town of Paradise and killed 85 people.
In her new book, The Last Fire Season (out on January 16 next year), Martin writes about the fires that swept through California in 2020, weaving her personal story with that of fire in California writ large. It’s a beautiful book, and I called her up to talk about her relationship with fire and how we can learn to live with the changing world. Our conversation has been edited for length and clarity.
The book opens in 2020, which was a year of multiple fire complexes. Was that the first time fire made itself known in the immediate vicinity of your home?
No, it wasn’t. But it was the first time that I realized that it wasn’t an anomaly.
We had horrible fires near my area in 2017. In 2018, the Camp Fire happened in Northern California, which was like a four-hour drive away, but the smoke from that fire lingered in the Bay Area for weeks. And then in 2019, the Kincade fire was a huge fire up here in Sonoma, and the entire west of the county was evacuated in basically the course of a night, including ourselves.
Then in 2020, the Lightning Complex fires happened in late August, which is what the book starts with. And that was the moment where I personally was like, “oh, this is going to keep happening.”
Before that a natural disaster to me felt like a thing that happened once and then that’s it, right? It wasn’t connected to larger things for me. But the fact is that the new wildfires that we’re having are bigger and hotter and far more destructive than the previous wildfires we’ve had, and 2020, which is probably far too late, was the year that I personally put that all together under the name of climate change. It wasn’t the first year I knew about fire, but it was the moment I realized that I was going to be living with fire for the rest of my life.
I was struck by your description of the 2020 fires and the ways that COVID complicated your experience of them. It reminded me of the concept of cascading events; it was striking to read about how your go bag was filled with these N95 masks that were there for the sake of the fires, but also, of course, turned out to have utility for this other thing that you’re dealing with at the same time.
That was one of the reasons why I chose to center the book around 2020. I think that was a moment where it became clear for a lot of people that disasters don’t take their turn. When it was happening, I felt it was a historic moment.
You named your book The Last Fire Season. But, of course, it wasn’t the last.
Unfortunately not. The book began as an essay, and since I was writing it in 2021 I thought I was writing about the last fire season I had experienced. But then I realized that it was actually a really great title for a book. It’s pretty commonly acknowledged now that in the North American West, fire season isn’t really a thing anymore. Now fire authorities talk about having a fire year.
That is directly linked to the changing of the weather and the climate. But for me, the deeper meaning of it is this idea that fire being seasonal also sort of implies that it’s temporary, and that it’s going to go away. But really it’s not seasonal, it’s part of this land. And we’re going to be living with it forever.
There’s a point in your book where you write that the California ecosystem was fire-adapted, but also that fire is changing. What do you mean by that?
Since time immemorial, California’s ecosystems — from oak woodlands to redwood forests to grasslands and chaparral — evolved with fire as part of their natural cycle. Fire is actually something that helps the cycle of the landscape reset and continue.
And this was something that Indigenous people knew and really sort of harnessed and used in the way that they tended the lands. But the genocide of Indigenous people in California really sort of stopped that cycle, as is the case with colonialism in most places.
Right, you have a chapter about the Indigenous history of fire in California and the suppression of fire both through violence against Indigenous communities and also a long history of policies against fire.
Yeah, the colonial policies of managing the land in California had been what they call ”total fire exclusion,” which is basically the idea that all fire is bad and we need to extinguish fires right away. There was a policy in place called the 10 AM policy that actually said every new forest fire needs to be extinguished by 10 AM the next morning. And, you know, there are a lot of reasons why that happened, including profits and fear and prioritizing human habitat and recreation over the landscape. But the result is that the landscapes here are actually neglected at this point, 150 years after colonization.
You wrote at one point about going to prescribed burns and there was a section that really stood out to me:
Fire is exuberant. It’s joyous. It dances. I can see why people joke that all firefighters are secret pyros. It’s so much fun.
I fully relate to this feeling. Has going to prescribed burns changed your own relationship with fire?
Good fire and cultural fire, which is generally the term we use when we’re talking about Indigenous use of fire, have radically changed my feelings about fire. Humans have evolved with fire, and the more I engage with fire, the more I learn about it, the more I understand its role in both the land and the history of this place, the less afraid I feel.
You write about your own experience with getting a hysterectomy and how that affected your life afterwards, and I thought that was an interesting choice. You could have written a book that was just about fire, and we could have never learned about your hysterectomy. But you chose to include it. Can you tell me a little bit about how that came to happen?
I could have written a straight journalistic look at wildfire right now or at the 2020 fire season specifically. And that was something I toyed with. But I ultimately realized, in thinking about this idea of cascading disasters, that they’re all happening while people are living their lives. Climate change, wars, economic ruin are all happening on top of whatever else is going on in your life. So I thought this part of my life was worth including.
The hysterectomy, and many associated health crises, led me to having chronic pain. And one of the only things that helped me with that was gardening. For me, the physical act of literally touching the land, being in this dialogue with the environment and the ecosystem around me, was the thing that helped me recover from this health crisis. I wasn’t quite well. And more importantly, nature wasn’t quite well. And gardening in this environment is what really made it click for me that this environment is going through a crisis as well.
That garden was partly how you knew about the oncoming fires in 2020, right?
Yeah, when the Lightning Complex fires started, I was out in my garden watering the roses. I saw this little black object on the ground, and when I leaned down and picked it up I saw it was a leaf of a California bay laurel tree. And it was burned black, but it was still whole. It had been blown on the wind and landed in my garden. It was sort of like a messenger, telling me that a few miles away these trees were burning.
Bay trees are a natural part of the forest understory here, but they are highly flammable. They’re basically made of oil, and they serve as what’s called a ladder fuel; if fire gets in that tree, it will shoot up it and then can get into the crowns of taller trees like redwoods or oaks that would normally be more fire resistant. It’s literally a fire spreader. Anyone who lives in the area will tell you that when there’s a fire nearby it rains burnt leaves.
Parts of the book are unexpectedly written in the past tense. You write, for example, that “Northern California was a very large place,” but the depictions of events in the past or future are written in the present tense. Was that intentional? Did you mean to contract the idea of Northern California?
I absolutely did. The convention in nonfiction is to write events in the past tense, but to phrase facts, or things that are still true, in the present tense. I felt like it was important to acknowledge that the things we take as granted, these truths about the way the environment works, might not always remain that way. It was also partly a pragmatic decision, because I didn’t know what would happen before the book came out. What if my house burned down before that, or if I have to move? Things are just so chaotic right now.
The other time I break with convention is when I write about Indigenous nations and Indigenous management practices. I intentionally used the present tense there as a way to push back against the trope of a lot of non-Indigenous writers portraying Indigenous people and worldviews as extinct when in fact they’re very, very alive.
Throughout the book you’re constantly talking to your partner about whether to stay in your home or move away to a “safer” area. I think it can be really hard for people who don’t live in areas under threat to grasp just how hard the concept of migrating really is.
Right, that’s such a common binary: to stay or go. And the reality is actually a lot messier. I’m fortunate to even have the choice of whether to stay or go; I am a person who has a lot of different privileges. I have resources, I have friends, I’m educated, I’m white.
Most people don’t willingly leave their homes unless things are really bad. But it’s never really all bad: Sometimes there’s extreme weather and disasters, and then there isn’t. It’s up and down. There’s a lot of talk around what the perfect solution is, where the safe places are. And the truth is that nowhere is safe because of climate change.
For me, the point of living at this moment on this planet is that it’s messy. It’s full of grief, it’s full of joy and beauty, and it’s also dangerous. There may be a time when I leave this place, for a variety of reasons. But I think the idea that you can run away from climate change is false.
Something I’ve learned a lot from talking with people who are deeply connected to the land here and who work with fire is that you have a responsibility to the place where you live. If I love this place so much, what do I owe it? The idea of tending a place for its overall health, not just for my personal survival, is very powerful.
Right, at one point you write about you and your partner thinking about doing prescribed burns in the woods near you to help reduce the risk of more fires.
We have thought a lot about the idea of reintroducing good fire where we live. Our neighborhood has been getting together and doing work days where we clear fuels from the forest floor together. And it’s really proof of how much work is needed, because you can clear brush and cut dead limbs off trees for a day with a group of 15 people, and then you look at this tiny quarter acre that you’ve worked on, and it still needs so much more work.
Stewardship is a constant act.
Absolutely. And it might not be perfect, and honestly it might not make a difference. These woods might still burn. But if and when they do burn, they are going to be healthier afterwards because the fire is going to be healthier.
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The offshore wind developer was in the process of completing necessary repairs when the administration issued its stop work order, according to court filings.
In the Atlantic ocean south of Massachusetts, 10 wind turbine towers, each 500 feet tall, stand stripped of their rotary blades. Stuck in this bald state due to the Trump administration’s halt on offshore wind construction, the towers are susceptible to lightning strikes and water damage. This makes them a potential threat to public safety, according to previously unreported court filings from the project developer, Vineyard Wind.
The company filed for an injunction against Trump’s stop work order last week. The order posed a unique threat to Vineyard Wind, as the project is 95% complete and its contract with a key construction boat is set to expire on March 31, the filing said. “If construction is not completed by that date, the partially completed wind turbines will be left in an unsafe condition and Vineyard Wind will incur a series of financial consequences that it likely could not survive,” the company wrote.
One of the final tasks the company was working on was replacing faulty blades on nearly two dozen turbine towers. In July 2024, one of the installed blades snapped in two, sending fiberglass and other debris crashing into the sea and eventually onto the beaches of Nantucket. The incident revealed a manufacturing defect at the Canadian factory where the blades were made. After multiple investigations into the incident, the company reached an agreement with the Bureau of Ocean Energy Management and the Bureau of Safety and Environmental Enforcement to replace the defective equipment with blades produced at a different factory in France.
Trump’s construction freeze contained an exception for activities “necessary to respond to emergency situations and/or to prevent impacts to health, safety, and the environment.” So after the order came down on December 22, Vineyard Wind reached out to the relevant regulators and asked permission to continue its blade replacement process on safety grounds, the company explained in court filings. BSEE responded that the company could remove the faulty blades on the 10 remaining towers, but could not replace them.
The decision highlights an apparent double standard in the administration’s considerations of public safety. The stop work order itself was intended to “protect the American people,” according to Secretary of the Interior Doug Burgum. Yet the agency has refused to let construction move forward to mitigate risks created by the stoppage.
Testimony submitted by Steven Simkins, Vineyard Wind’s Wind turbine team lead, describes the dangers of leaving the towers bladeless for an extended period of time — a risk compounded by the ticking clock on the company’s construction boat contract. “The wind turbine was designed to be constructed completely and only be in a hammerhead state, without blades, for a brief amount of time during installation,” Simkins wrote.
He warned of three main liabilities. First, the towers are equipped with a lightning protection system, but the system’s receptors and conductors extend along the blades. Without the blades, the towers are essentially lightning rods, at risk of igniting an electrical fire, Simkins explained.
The three giant holes where the blades would be installed are also sitting open, with tarps covering them as temporary protection. That means that water, ice, and humidity could get into the nacelle, the top part of the tower that houses all of the electrical and mechanical systems, which are not designed to weather this kind of exposure. “Not only will this lead to prolonged offshore work replacing damaged equipment but it also puts the safety of the workers at risk,” Simkins wrote. “Electrical cabinets that have experienced some level of corrosion become less safe and increase the risk of an arc flash event.”
Lastly, the 500-foot towers are being roiled by winter wind and waves, which causes them to sway. The blades are designed to capture that wind, reducing its force on the towers. Without them, the “fatigue” on the towers will be exacerbated, “and the design has accounted for a limited amount of such fatigue over the total life of the structure.”
Court documents show that Vineyard Wind — the last of five affected companies to file for an injunction against Trump’s stop work order — held off on litigation as it made multiple attempts to convince the administration that completing blade installation was necessary to mitigate safety risks.
Vineyard Wind also sent BSEE verification of its safety claims by DNV Energy Systems, a Danish company it was required to retain to “ensure that the Project is installed in accordance with accepted engineering practices and, when necessary, to provide reports to BSEE regarding incidents affecting Critical Safety Systems.” But BSEE disagreed and denied Vineyard Wind’s request.
The Trump administration filed a response in the case on Tuesday, with BSEE’s Principal Deputy Director Kenneth Stevens testifying that the bureau’s technical personnel had “determined that there should be no structural issues associated with the tower and nacelle-only configuration if they were installed correctly.” He noted that the towers had been “routinely left in this configuration repeatedly” while the project was under construction over the past year and a half “with no reported adverse impacts to safety.”
Vineyard Wind did not respond to a request for comment on that assertion. A hearing in the case is scheduled for Friday. Three separate district judges have already granted injunctions to offshore projects affected by the stop work order: Revolution Wind, Empire Wind, and Dominion Energy’s Coastal Virginia offshore wind project. Each judge found that the companies were “likely” to succeed in showing that the stop work order violated the Administrative Procedures Act, and allowing them to continue construction.
Jael Holzman contributed reporting.
One of the buzziest climate tech companies in our Insiders Survey is pushing past the “missing middle.”
One of the buzziest climate tech companies of the past year is proving that a mature, hitherto moribund technology — conventional geothermal — still has untapped potential. After a breakthrough year of major discoveries, Zanskar has raised a $115 million Series C round to propel what’s set to be an investment-heavy 2026, as the startup plans to break ground on multiple geothermal power plants in the Western U.S.
“With this funding, we have a six power plant execution plan ahead of us in the next three, four years,” Diego D’Sola, Zanskar’s head of finance, told me. This, he estimates, will generate over $100 million of revenue by the end of the decade, and “unlock a multi-gigawatt pipeline behind that.”
The size of the round puts a number to climate world’s enthusiasm for Zanskar. In Heatmap’s Insider’s Survey, experts identified Zanskar as one of the most promising climate tech startups in operation today.
Zanskar relies on its suite of artificial intelligence tools to locate previously overlooked conventional geothermal resources — that is, naturally occurring reservoirs of hot water and steam. Trained on a combination of exclusive subsurface datasets, modern satellite and remote sensing imagery, and fresh inputs from Zanksar’s own field team, the company’s AI models can pinpoint the most promising sites for exploration and even guide exactly what angle and direction to drill a well from.
Early last year, Zanskar announced that it had successfully revitalized an underperforming geothermal power plant in New Mexico by drilling a new pumped well nearby, which has since become the most productive well of this type in the U.S. That was followed by the identification of a large geothermal resource in northern Nevada, where exploratory wells had been drilled for decades but no development had ever occurred. Just last month, the company revealed a major discovery in western Nevada — a so-called “blind” geothermal system with no visible surface activity such as geysers or hot springs, and no history of exploratory drilling.
“This is a site nobody had ever had on the radar, no prior exploration,” Carl Hoiland, Zanskar’s CEO, told me of this latest discovery, dubbed “Big Blind.” He described it as a tipping point for the industry, which had investors saying, “Okay, this is starting to look more like a trend than just an anomaly.”
Spring Lane Capital led Zanskar’s latest round, which also included Obvious Ventures, Union Square Ventures, and Lowercarbon Capital, among others. Spring Lane aims to fill the oft-bemoaned “missing middle” of climate finance — the stage at which a startup has matured beyond early-stage venture backing but is still considered too risky for more traditional infrastructure investors.
Zanskar now finds itself squarely in that position, needing to finance not just the drills, turbines, and generators for its geothermal plants, but also the requisite permitting and grid interconnection costs. D’Sola told me that he expects the company to close its first project financing this quarter, explaining that its ambitious plans require “north of $600 million in total capital expenditures, the vast majority of which will come from non-dilutive sources or project level financing.”
Unsurprisingly, the company anticipates that data centers will be some of its first customers, with hyperscalers likely working through utilities to secure the clean energy attributes of Zanskar’s grid-connected power. And while the West Coast isn’t the primary locus of today’s data center buildout, Hoiland thinks Zanskar’s clean, firm, low-cost power will help draw the industry toward geothermally rich states such as Utah and Nevada, where it’s focused.
“We see a scenario where the western U.S. is going to have some of the cheapest carbon-free energy, maybe anywhere in the world, but certainly in the United States.” Hoiland told me.
Just how cheap are we talking? Using the levelized cost of energy — which averages the lifetime cost of building and operating a power plant per unit of electricity generated — Zanskar plans to deliver electricity under $45 per megawatt-hour by the end of this decade. For context, the Biden administration set that same cost target for next-generation geothermal systems such as those being pursued by startups like Fervo Energy and Eavor — but projected it wouldn’t be reached 2035.
At this price point, conventional geothermal would be cheaper than natural gas, too. The LCOE for a new combined-cycle natural gas plant in the U.S. typically ranges from $48 to $107 per megawatt-hour.
That opens up a world of possibilities, Hoiland said, with the startup’s’s most optimistic estimates showing that conventional geothermal could potentially supply all future increases in electricity demand. “But really what we’re trying to meet is that firm, carbon-free baseload requirement, which by some estimates needs to be 10% to 30% of the total mix,” Hoiland said. “We have high confidence the resource can meet all of that.”
On New Jersey’s rate freeze, ‘global water bankruptcy,’ and Japan’s nuclear restarts
Current conditions: A major winter storm stretching across a dozen states, from Texas to Delaware, and could hit by midweek • The edge of the Sahara Desert in North Africa is experiencing sandstorms kicked up by colder air heading southward • The Philippines is bracing for a tropical cyclone heading toward northern Luzon.
Mikie Sherrill wasted no time in fulfilling the key pledge that animated her campaign for governor of New Jersey. At her inauguration Tuesday, the Democrat signed a series of executive orders aimed at constraining electricity bills and expanding energy production in the state. One order authorized state utility regulators to freeze rate hikes. Another directed the New Jersey Board of Public Utilities “to open solicitations for new solar and storage power generation, to modernize gas and nuclear generation so we can lower utility costs over the long term.” Now, as Heatmap’s Matthew Zeitlin put it, “all that’s left is the follow-through,” which could prove “trickier than it sounds” due to “strict deadlines to claim tax credits for renewable energy development looming.”
Last month, the environmental news site Public Domain broke a big story: Karen Budd-Falen, the No. 3 official at the Department of the Interior, has extensive financial ties to the controversial Thacker Pass lithium mine in northern Nevada that the Trump administration is pushing to fast track. Now The New York Times is reporting that House Democrats are urging the Interior Department’s inspector general to open an investigation into the multimillion-dollar relationship Budd-Falen’s husband has with the mine’s developer. Frank Falen, her husband, sold water from a family ranch in northern Nevada to the subsidiary of Lithium Americas for $3.5 million in 2019, but the bulk of the money from the sale depended on permit approval for the project. Budd-Falen did not reveal the financial arrangement on any of her four financial disclosures submitted to the federal government when she worked for the Interior Department during President Donald Trump’s first term from 2018 to 2021.
House Republicans, meanwhile, are planning to vote this week to undo Biden-era restrictions on mining near more than a million acres of Minnesota wilderness. “Mining is huge in Minnesota. And all mining helps the school trust fund in Minnesota as well. So it benefits all schools in the state,” Representative Pete Stauber, a Minnesota Republican and the chair of the Natural Resources Subcommittee on Energy and Mineral Resources, said of the rule-killing bill he sponsored. While the vote is expected to draw blowback from environmentalists, E&E News noted that it could also agitate proceduralists who oppose the GOP’s continued “use of the rule-busting Congressional Review Act for actions that have not been traditionally seen as rules.” Still, the move is likely to fuel the dealmaking boom for critical minerals. As Heatmap’s Katie Brigham wrote in September, “everybody wants to invest” in startups promising to mine and refine the metals over which China has a near monopoly.
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A new United Nations report declares that the world has entered an era of “global water bankruptcy,” putting billions of people at risk. In an interview with The Guardian, Kaveh Madani, the report’s lead author, said that while not every basin and country is directly at risk, trade and migration are set to face calamity from water shortages. Upward of 75% of people live in countries classified as water insecure or critically water insecure, and 2 billion people live on land that is sinking as groundwater aquifers collapse. “This report tells an uncomfortable truth: Many critical water systems are already bankrupt,” Madani said. “It’s extremely urgent [because] no one knows exactly when the whole system would collapse.”

The Democratic Republic of the Congo has given the U.S. government a vetted list of mining and processing projects open to American investment. The shortlist, which Mining.com said was delivered to U.S. officials last week, includes manganese, gold, and cassiterite licenses; a copper-cobalt project and a germanium-processing venture; four gold permits; a lithium license; and mines producing cobalt, gold, and tungsten. The potential deals are an outgrowth of the peace agreement Trump brokered between the DRC and Rwanda-backed rebels, and could offer Washington a foothold in a mineral-rich country whose resources China has long dominated. But establishing an American presence in an unstable African country is a risky investment. As I reported for Heatmap back in October, the Denver-based Energy Fuels’ $2 billion mining project in Madagascar was suddenly thrown into chaos when the island nation’s protests resulted in a coup, though the company has said recently it’s still moving forward.
The Tokyo Electric Power Company is delaying the restart of the Kashiwazaki Kariwa nuclear power station in western Japan after an alarm malfunction. The alarm system for the control rods that keep the fission reaction in check failed to sound during a test operation on Tuesday, Tepco said. The world’s largest nuclear plant had been scheduled to restart one of its seven reactors on Tuesday. Fuel loading for the reactor, known as Unit 6, was completed in June. It’s unclear when the restart will now take place.
The delay marks a setback for Prime Minister Sanae Takaichi, who has made restarting the reactors idled after the 2011 Fukushima disaster and expanding the nuclear industry a top priority, as I told you in October. But as I wrote last month in an exclusive about Japan’s would-be national small modular reactor champion, the country has a number of potential avenues to regain its nuclear prowess beyond just reviving its existing fleet.
As a fourth-generation New Yorker, I’m qualified to say something controversial: I love, and often even prefer, Montreal-style bagels. They’re smaller, more efficient, and don’t deliver the same carbohydrate bomb to my gut. Now the best-known Montreal-style bagel place in the five boroughs has found a way to use the energy needed to make their hand-rolled, wood-fired bagels more efficiently, too. Black Seed Bagels’ catering kitchen in northern Brooklyn is now part of a battery pilot program run by David Energy, a New York-based retail energy provider. The startup supplied suitcase-sized batteries for free last August, allowing Black Seed to disconnect from ConEdison’s grid during hours when electricity rates are particularly high. “We’re in the game of nickels and dimes,” Noah Bernamoff, Black Seed’s co-owner, told Canary Media. “So we’re always happy to save the money.” Wise words.