U.S. Electricity Demand Peaks In July 2024 Amid Record Heatwaves

U.S. electricity demand reached its peak in July 2024 amid widespread heatwaves across the country. According to the Hourly Electric Grid Monitor, the highest demand occurred at 6:00 p.m. Eastern Daylight Time on July 15, when electricity use hit approximately 745 gigawatt-hours (GWh). This peak was similar to previous years, with demand recorded at 742 GWh in 2023 and 743 GWh in 2022. Overall, U.S. electricity generation from January to July 2024 was about 2,500 terawatt-hours (TWh), reflecting a 4% increase compared to the 2,397 TWh generated during the same period in 2023.

Demand for electricity in the U.S. typically peaks in July or August due to increased air conditioning usage during hot weather. The National Oceanic and Atmospheric Administration (NOAA) reported that July 2024 experienced above-average temperatures across many regions, particularly in the West, Northeast, and Southeast. This contributed to heightened electricity demand, especially in cities like Baltimore and Washington, D.C., where temperatures soared to 100°F or higher for several consecutive days.

While the overall peak electricity generation in the contiguous United States remained stable compared to previous years, some regions saw significant year-over-year increases in peak demand influenced by local weather conditions, power grid situations, and electricity availability.

In the Eastern Interconnection, which covers a large part of the East Coast, electricity demand peaked at approximately 549 GWh on July 15. This spike was attributed to extreme temperatures in several states. Another high point occurred on August 1, nearing July’s peak at about 540 GWh, but demand was somewhat reduced due to rain and outages caused by Hurricane Debby, which impacted the East Coast from August 4 to 10.

In Texas, hourly electricity demand reached a peak of 86 GWh on August 20, nearly matching the all-time high of 85 GWh set in August 2023. Earlier in July, demand had peaked at 81 GWh on July 1 but fell to 55 GWh by July 8 due to Hurricane Beryl making landfall along the Texas coast.

In the Western Interconnection, which does not include Canada, demand peaked at 141 GWh on July 10. When including British Columbia and Alberta, demand reached a record 168 GWh on that same date. Despite the heatwave, the California Independent System Operator (CAISO) reported a peak demand of 45 GWh on July 24, lower than the previous record of 52 GWh set on September 6, 2022.