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Coachella Valley Horse Rescue director Annette Garcia comforts a rescue horse Smokey, after strapping ice packs to his legs to help keep him cool in Indio, Calif., in July. Photo: Mario Tama/Getty Images

A billion people will endure extreme heat stress if global temperatures were to increase by 2°C (3.6°F), research announced Tuesday by the U.K.'s Met Office at the COP26 climate summit warns.

Why it matters: Current targets being discussed at COP26 in Glasgow, Scotland, would see global average temperatures overshoot the Paris Agreement's most ambitious target of 1.5ºC of warming, compared to preindustrial levels, per Axios' Andrew Freedman.

For the record: The U.S. and other countries have already faced historic heat waves in recent years — notably, the deadly hot weather that gripped the Pacific Northwest this past summer, which researchers found would have been "virtually impossible without human-caused climate change."

  • In the summer of 2020, more than a quarter of the American population suffered from the effects of extreme heat, according to a study published earlier this year.

Threat level: Heat stress, a potentially fatal combination of dangerous heat and humidity, already affects 68 million people worldwide, per the Met Office research.

  • The modeling from the national weather service and the EU-funded project HELIX, led by the University of Exeter, suggests this could increase nearly 15-fold if the world's temperature rise reached 2°C.
  • "A 4.0°C rise could see nearly half of the world's population living in areas potentially affected," the report warned.

Of note: Andy Hartley, the Met Office's climate impacts lead, noted in a statement that the heat stress metric is currently met in several locations, "such as parts of India."

  • But "our analysis shows that with a rise of 4°C extreme heat risk could affect people in large swathes of most of the world's continent," he said.

The big picture: The findings mapping heat stress maps are part of a wider project forecasting the impacts of the consequences of climate change with temperature rises of 2°C and 4°C — the others being river flooding; risk of wildfire; drought; and food insecurity.

The bottom line, via Professor Richard Betts, of the University of Exeter and Met Office, who led the HELIX project: "This new combined analysis shows the urgency of limiting global warming to well below 2°C."

  • "The higher the level of warming, the more severe and widespread the risks to people’s lives, but it is still possible to avoid these higher risks if we act now," Betts said.
  • Andy Wiltshire, head of earthy system and mitigation science at the Met Office, added: "Rapid emission reductions are required if we are to avoid worst consequences of unmitigated climate change."

Go deeper

What's next for the Fed on climate change

Photo illustration: Annelise Capossela/Axios. Getty Images photos: Andrew Caballero-Reynolds/AFP and Lev Radin/Pacific Press/LightRocket

The Federal Reserve is poised to increase its climate focus even as President Biden's nomination of Chairman Jerome Powell to a second term disappointed advocates of policies to tilt the economy away from fossil fuels.

Catch up fast: Biden on Monday announced Powell's nod and said he's tapping Lael Brainard — a Fed board member who's outspoken on climate — as vice chair.

Storms pummel flood-hit Pacific Northwest as border river overflows

An image of the water-logged Sumas Prairie area taken last Friday. Photo: B.C. Ministry of Transportation/Twitter.

The latest ferocious storm system to hit the Pacific Northwest triggered fresh evacuation orders and at least one mudslide in flood-ravaged British Columbia, Canada, late Sunday.

Threat level: Flood sirens sounded in Washington state as the Nooksack River overflowed. Henry Braun, mayor of Abbotsford, B.C., told reporters the water flow was headed toward the Canadian border city later Sunday. "There's nothing to stop it," he said.

Updated 4 hours ago - Health

First North American Omicron cases identified in Canada

COVID-19 testing personnel at Toronto Pearson International Airport in September. Photo: Steve Russell/Toronto Star via Getty Images

The first two cases of the new Omicron variant have been detected in North America, the Canadian government announced Sunday evening.

Driving the news: The World Health Organization has named Omicron a "variant of concern," but cautioned earlier on Sunday that it is not yet clear whether it's more transmissible than other strains of COVID-19.

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