An exceptional autumn heat wave, which began in the southwestern United States last week, sent temperatures soaring to 117 degrees in Palm Springs, Calif., on Tuesday — matching the highest temperature ever observed in the United States during October.
The high of 117 also matched the record for North America during October, according to weather historian Maximiliano Herrera.
Dozens of other locations, including Phoenix and Death Valley, Calif., set October high temperature records while Las Vegas fell just short.
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