Millions of people in Canada sweltering as heat wave continues to move eastward0

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• July 15, 2026

Meanwhile, millions of people are under heat advisories in the US cities of Boston, New York, Philadelphia and as far west as Buffalo, New York, which will last through Wednesday. The Northern Plains, Midwest and Northeast will be hardest hit, with temperatures in Chicago forecast to reach 97°F on Wednesday. New York could reach 100F,