Last week, Lytton, a small town in British Columbia, Canada, broke its nation’s all-time temperature reading three days in a row as temperatures soared as high as 121 degrees. Days later, the village largely burned to the ground as extreme wildfires spewed smoke and ash 55,000 feet into the sky. Now, southwest Canada and much of the western United States are bracing for another bout of exceptional heat amid a pattern that could once again place records in jeopardy. Death Valley, Calif., might spike to 130 degrees.

Temperatures up to 25 degrees above average could dominate most of the West this weekend into next week, with little relief in sight for quite some time. Odds favor anomalously hot and dry conditions to prevail into the fall.

Excessive heat watches blanket much of southeast California in the Mojave Desert, as well as southern Nevada and adjacent northwest Arizona. Heat advisories and excessive heat warnings extend through the Great Basin northward into interior northern California, western Utah, southeast Oregon and southern Idaho.

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“This warning is reserved for only the hottest days of the year and is issued when temperatures are expected to rise to dangerous levels,” wrote the National Weather Service office in Flagstaff, Ariz. Between Wednesday and Saturday, high temperatures below 4,000 feet elevation in northwest Arizona, particularly in the canyons, could range between 110 and 117 degrees.