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An aerial view of wildfire of Tatkin Lake in British Columbia, Canada on July 10, 2023.

BC Wildfire Service | Anadolu Agency | Getty Images

Record high temperatures and a record fire season are hitting Canada at the same time this summer, leading to an unprecedented combination of heat, fire and dangerous smoke plumes.

“I can’t emphasize enough just how terrifying this moment is on our planet. With global temperature records breaking and fires and floods raging around the world, our house is truly on fire,” Kristina Dahl, principal climate scientist at the Union of Concerned Scientists, told CNBC.

Climate change, caused by greenhouse gas emissions, is making the planet hotter and also increasing the potency of the ingredients that are necessary for wildfires to burn. Even if humans stopped burning all fossil fuels today, the carbon dioxide already in the atmosphere is going to continue heating the planet for decades to come.

“If I had a magic wand and said, ‘no more greenhouse gases being produced from human activities as of now,’ we will continue to warm for 30 to 50 years,” explained Michael Flannigan, the research chair for predictive services, emergency management and fire science at Thompson Rivers University British Columbia.

That means what’s happening now is unprecedented, but it’s also a harbinger of what’s coming.

“This is the new reality, not the new normal, because we’re on a downward spiral,” Flannigan told CNBC.

Record-breaking wildfires with no end in sight

On June 27, Canada surpassed the record set in 1989 for total area burned in one season when it reached 7.6 million hectares, or 18.8 million acres, a communications officer for Natural Resources Canada, told CNBC.

The total has since increased to 9.3 million hectares, or 23 million acres, which is about the size of South Carolina. The average is around 2.2 million hectares, or 5.4 million acres, or about the size of Massachusetts.

“The current wildfire season in Canada has been astounding and record breaking,” Dahl told CNBC.

Soon, the total amount of land burned this year will hit the equivalent of Maine, Flannigan said.

“We’re used to getting fires in the West, or the East, or in the north, or the central — but not the whole country at the same time,” Flannigan told CNBC.

An aerial view of wildfire of Tatkin Lake in British Columbia, Canada on July 10, 2023.

BC Wildfire Service | Anadolu Agency | Getty Images

And the fire season is not even close to over. There are currently 908 active fires burning in Canada, and 576 of those are classified as “out of control,” according to data in a real time dashboard operate by the Canadian Interagency Forest Fire Centre as of 2:15pm EST on Thursday.

“I’m not sure where we’re going to end up with this because it keeps keeps on burning,” Flannigan told CNBC. “Some of these fires are huge. And they will burn all summer, all fall, and some of them will burn through winter. Underground they smolder and even though you can have snow on top, they keep burning underground. And then spring, the snow melts, stuff gets hot, dry and windy. They pop to the surface and start spreading again.”

Record heat turns vegetation into kindling

Earlier in July, the Earth recorded its hottest average day since records began — then repeated the feat three times in four days.

Temperatures in Canada are no exception. Earlier this year, Fort Good Hope, at about 66 degrees north latitude in the Northwest Territories, reached 37.4 degrees Celsius — more than 99 degrees Fahrenheit — setting a record for the warmest Canadian temperature at that latitude, according to the Canadian government. Subsequent readings in nearby communities were even hotter, according to news reports.

“We’re in uncharted waters here,” Dahl told CNBC.

“Since May we’ve seen a pattern of heat domes developing in parts of North America,” Dahl told CNBC. A heat dome is a weather event that occurs when the atmosphere traps hot air like a lid or a cap, as the National Oceanic and Atmospheric Administration describes it. “These zones of extreme heat tend to persist for long stretches of time — weeks in some cases. The heat dome that developed in May was linked to the development and spread of the fires in Alberta that kicked off the start of Canada’s record-breaking fire season.”

“I’ve never seen it start so early that far north,” Flannigan told CNBC. Before he started working in academia, Flannigan worked for the Canadian Forest Service for 30-plus years.

Hotter weather dries out vegetation, which serves as fuel for the wildfires.

“The warmer it gets, the atmosphere gets more efficient at sucking the moisture out of the fuels,” Flannigan told CNBC. “It’s not a linear increase, it’s almost exponential.”

Also, warmer temperatures lead to more lightning, Flannigan said. In Canada, about half of wildfires are started by lightning, but they are responsible for 80% to 90% of the land burned, since these areas tend to be remote and harder for firefighters to reach.

A future of more fire and smoke

Three key ingredients for a wildfire spread are fuel, ignition and weather, Sarah Burch, a climate change professor at the University of Waterloo and the executive director of the Waterloo Climate Institute, told CNBC.

“While wildfire is a natural feature of healthy ecosystems, climate change affects all three of the factors” that cause wildfires, Burch told CNBC. So, too, does land management. For example, the mountain pine beetle is killing trees and turning them into fuel for wildfires, Burch told CNBC. And long-duration droughts also make forests more flammable.

“This means that we expect fires to increase in frequency and intensity in the future,” Burch told CNBC.

People will have to learn to live alongside those wildfires.

Smoke from wildfires in Canada shrouds the Empire State Building on June 30, 2023 in New York City.

David Dee Delgado | Getty Images

“This is a common misconception of people that fire management can stop all fires all the time. Obviously, that’s not true,” Flannigan said.

If firefighters arrive when a fire is still small, they can put it out. But sometimes a fire can balloon into a high-intensity blaze in as little as 15 minutes. When a wildfire becomes a “crown fire,” meaning it jumps from tree top to tree top, “the horse has left the barn,” Flannigan told CNBC. “It’s too late. You’ve missed your window.”

Some fire mitigation techniques can work to slow the back end of a fire that’s already burning at full intensity, but when “that head is just racing across the landscape, you just have to get out of the way.”

This means more smoke from these wildfires traveling to other parts of the globe, too. Earlier in July, wildfire smoke from Canada blanketed much of the United States mid-west and Eastern seaboard.

There is no silver bullet to solving this problem, Flannigan says. Drones and artificial intelligence can help scientists track and monitor fire movement, but they are tools, not solutions. The only long-term solution is to reduce greenhouse gas emissions on a global scale to mitigate the effects of climate change.

“I think there’s still time if we get our act together as a global society to deal with this. And sometimes people need a bloody nose or two before we change our behavior. We can change. And I’m hoping that we’re getting the bloody noses and now we’ll actually do something about fossil fuels,” Flannigan said.

How cloud seeding can help alleviate drought

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Perplexity launches AI-powered web browser for select group of subscribers

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Perplexity launches AI-powered web browser for select group of subscribers

Dado Ruvic | Reuters

Perplexity AI on Wednesday launched a new artificial intelligence-powered web browser called Comet in the startup’s latest effort to compete in the consumer internet market against companies like Google and Microsoft.

Comet will allow users to connect with enterprise applications like Slack and ask complex questions via voice and text, according to a brief demo video Perplexity released on Wednesday.

The browser is available to Perplexity Max subscribers, and the company said invite-only access will roll out to a waitlist over the summer. Perplexity Max costs users $200 per month.

“We built Comet to let the internet do what it has been begging to do: to amplify our intelligence,” Perplexity wrote in a blog post on Wednesday.

Perplexity is best known for its AI-powered search engine that gives users simple answers to questions and links out to the original source material on the web. After the company was accused of plagiarizing content from media outlets, it launched a revenue-sharing model with publishers last year.

In May, Perplexity was in late-stage talks to raise $500 million at a $14 billion valuation, a source familiar confirmed to CNBC. The startup was also approached by Meta earlier this year about a potential acquisition, but the companies did not finalize a deal.

“We will continue to launch new features and functionality for Comet, improve experiences based on your feedback, and focus relentlessly–as we always have–on building accurate and trustworthy AI that fuels human curiosity,” Perplexity said Wednesday.

WATCH: Perplexity CEO on AI race: The market of providing answers to questions will become a commodity

Perplexity CEO on AI race: The market of providing answers to questions will become a commodity

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Retailers log $7.9 billion in online sales in first 24 hours of Prime Day

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Retailers log .9 billion in online sales in first 24 hours of Prime Day

A worker sorts packages on Amazon Prime Day in New York on July 8, 2025.

Klaus Galiano | Bloomberg | Getty Images

U.S. online sales jumped 9.9% year over year to $7.9 billion on Tuesday, the kickoff of Amazon‘s Prime Day megasale, according to Adobe Analytics.

At that level, it marks the “single biggest e-commerce day so far this year,” Adobe said. It also eclipsed total online spending during Thanksgiving last year, when sales on the holiday reached $6.1 billion.

Amazon’s Prime Day bargain blitz began on Tuesday and lasts through Friday. The event, first launched in 2015 as a way to hook new Prime members, has pushed other retailers to launch counterprogramming.

Walmart‘s six-day deals event also started Tuesday, while Target Circle Week kicked off on Sunday and Best Buy launched a Black Friday in July promotion that began Monday.

Home and outdoor goods showed signs of strong demand during the first day of Amazon’s discount event, said Kashif Zafar, CEO of Xnurta, an advertising platform that serves more than 20,000 online businesses.

Read more CNBC Amazon coverage

Other historically well-performing categories such as beauty and household essentials saw softer demand early on, but could see demand pick up as Prime Day continues, he added.

“Early Prime Day numbers might look soft compared to last year’s surge, but it’s too early to call the event a miss,” Zafar said in an email. “With four days instead of two, we’re seeing a different rhythm, consumers are spreading out their purchases.”

Adobe expects online sales to reach $23.8 billion across all retailers during the 96-hour event, a level that’s “equivalent to two Black Fridays.”

U.S. online shoppers spent $14.2 billion during the 48-hour Prime Day event last year, according to Adobe.

This year’s Prime Day is landing at an uncertain time for retailers and consumers as they grapple with the fallout of President Donald Trump‘s unpredictable tariff policies.

U.S. consumer confidence worsened in June after improving in May as Americans remained concerned about the tariffs’ effect on the economy and prices, according to the Conference Board.

Amazon CEO Andy Jassy said last month the company hasn’t seen prices “appreciably go up” on its site as a result of tariffs.

Some third-party sellers previously told CNBC they were considering raising or had already raised the price of some of their products manufactured in China as the cost of tariffs became burdensome.

Don’t miss these insights from CNBC PRO

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Photos show Altman, Iger and Cook arrive at ‘summer camp for billionaires’ in Sun Valley

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Photos show Altman, Iger and Cook arrive at 'summer camp for billionaires' in Sun Valley

Sun Valley: Tech CEOs convene as leaders discuss the impact of tariffs, future plans

Top executives from tech, media and finance gathered in Sun Valley, Idaho, for Allen & Co.’s annual conference this week, an event that is often referred to as “summer camp for billionaires.”

Apple CEO Tim Cook, Walmart CEO Doug McMillon, Disney CEO Bob Iger and OpenAI CEO Sam Altman were all pictured entering the lodge.

Wednesday’s agenda includes interviews with Amazon CEO Andy Jassy, Treasury Secretary Scott Bessent and IAC Chairman Barry Diller, sources told CNBC’s Julia Boorstin.

When he arrived on Tuesday, Altman said he is not concerned about the artificial intelligence talent war and that he would talk to Meta CEO Mark Zuckerberg this week.

Scroll down to see the tech and media moguls arriving at the exclusive event.

Apple CEO Tim Cook

Tim Cook arrives for the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.

David Grogan | CNBC

Comcast CEO Brian Roberts and Disney CEO Bob Iger

Brian Roberts, CEO of Comcast, and Bob Iger (R), CEO of Walt Disney Co., attend the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.

David A. Grogan | CNBC

TV host Gayle King

Gayle King attends the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.

David A. Grogan | CNBC

OpenAI CEO Sam Altman

Sam Altman, CEO of OpenAI, attends the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.

David A. Grogan | CNBC

GM CEO Mary Barra

Mary Barra, CEO of General Motors, attends the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.

David A. Grogan | CNBC

Spanx founder Sara Blakely

Sara Blakely, founder of Spanx, arrives for the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.

David A. Grogan | CNBC

Walmart CEO Doug McMillon

Doug McMillon, CEO of Walmart, arrives for the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.

David A. Grogan | CNBC

Entertainment executive Casey Wasserman

Casey Wasserman, CEO of Wasserman Media Group, arrives for the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.

David A. Grogan | CNBC

Boston Red Sox and Liverpool FC owner John Henry

John Henry attends the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.

David A. Grogan | CNBC

OpenAI Chair Bret Taylor

Bret Taylor, chairman of the board of directors of OpenAI, attends the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.

David A. Grogan | CNBC

Warner Bros. Discovery CEO David Zaslav

David Zaslav, CEO of Warner Bros. Discovery, attends the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.

David A. Grogan | CNBC

Home Depot co-founder Ken Langone

Ken Langone attends the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.

David A. Grogan | CNBC

Billionaire investor Stanley Druckenmiller

Stanley Druckenmiller attends the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.

David A. Grogan | CNBC

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