June heat wave increased electricity demand in the eastern and midwestern United States

Electricity demand in the eastern and midwestern United States increased in June as a heatwave settled across the Midwest, mid-Atlantic, and Northeast regions of the United States. Demand across the Eastern Interconnection—which covers much of the mainland United States east of the Rocky Mountains except Texas—peaked at 502,670 megawatts (MW) in a single hour on June 21, compared with the hourly June peak of 467,609 MW in 2023.
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