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Firefighters try to extinguish flames from the Dixie Fire near Chico in Greenville, Calif., on Thursday. Photo: Neal Waters/Anadolu Agency via Getty Images

Forecasters are warning Americans to brace for another extreme heat wave this week, as 107 large wildfires burn across nearly 2.3 million acres of the U.S. West.

Driving the news: "Widespread air quality alerts and scattered Red Flag Warnings stretch from the Northwest and Northern Rockies to the High Plains, as well as throughout parts of central California," the National Weather Service said Sunday.

"It's going to be a real oppressive week with dangerous heat and hot conditions across much of the U.S. Excessive heat watches are up across much of the Pacific Northwest for mid to late week, including in the Portland and Seattle metro areas. Meanwhile, heat advisories are in effect for a good part of the south-central U.S. and parts of western New York state."
— NWS

State of play: The massive wildfires were burning across 15 states on Sunday —with weather conditions already dangerous in several places, according to the National Interagency Fire Center.

  • The Dixie Fire, California's second-biggest wildfire in the state's history, is the largest blaze now burning in the U.S. It has destroyed 627 buildings, damaged 42 other structures and razed 489,287 acres as of Sunday night.
  • "Near critical conditions with wind gusts up to 45 mph were reported over north central Montana, and up to 30 mph in eastern Oregon," the NIFC noted in its statement.
  • "These winds caused active fire behavior on the Whitmore, Green Ridge, Black Butte, Thorne Creek, and Woods Creek fires. Extensive smoke continues to blanket California, although many wildfires were active in the late afternoon."

By the numbers: Per the NIFC on Sunday, 25 large fires were burning in Montana, 20 in Idaho, 16 in Oregon, 13 in Washington state, 11 in California, 10 in Alaska and four in Wyoming.

  • Colorado, Utah, Nevada, Arizona, Minnesota, South Dakota, Nebraska and New Mexico had each reported one large fire burning.

What to watch: "The fire outlook continues to reflect warmer and drier conditions leading to the high potential for severe wildfire activity throughout the western United States through the rest of summer and into the fall," per the NIFC.

  • "Widespread high temperatures observed across areas in the West and with periods of lightning activity continue to exacerbate the wildfire situation."

The big picture: The past few months have already seen an unprecedented, deadly heat wave in the Pacific Northwest, with wildfires raging well ahead of peak fire season.

Editor's note: This article has been updated with details of the UN climate report.

Go deeper

Oct 12, 2021 - Science

Weather and climate disasters have cost the U.S. over $100 billion in 2021

Piles of debris is all that's left of a restaurant after heavy rain from remnants of Hurricane Ida came through in Manville, New Jersey, on Sept. 7. Photo: Tayfun Coskun/Anadolu Agency via Getty Images

Weather and climate disasters in 2021 have killed 538 people in the U.S. and cost over $100 billion, according to a report from the National Oceanic and Atmospheric Administration.

Why it matters: The first nine months of 2021 saw the largest number of billion-dollar disasters in a calendar year so far, with 2021 on pace for second behind 2020, per the report.

Ina Fried, author of Login
6 mins ago - Technology

Intel CEO blames predecessors for manufacturing woes

Axios on HBO

When it comes to Intel's recent manufacturing problems, Intel CEO Pat Gelsinger places the blame squarely on his predecessors — many of whom he notes were not engineers deeply steeped in chip technology, as he is.

Why it matters: Gelsinger has announced a broad plan to reinvigorate Intel by doubling down on manufacturing. However, the strategy depends on the venerable semiconductor giant recovering from recent stumbles.

Marketing to Generation Alpha

Illustration: Rae Cook/Axios

Marketers are pouring money into figuring out the tastes and habits of Generation Alpha — kids born from 2010 through 2024— who are unprecedented in the extent they're growing up online.

Why it matters: They're weaned on TikTok, Amazon and in-app purchases. They're learning from their millennial parents to hold brands accountable for causes like social justice and sustainability. And no prior age cohort will be as large in size or marketing power.