Heat Waves and Data Centers Strain U.S. Power Grids
Heat Waves and Data Centers Strain U.S. Power Grids
US · Published Jul 28, 2026
Back-to-back heat waves across the United States are placing significant stress on electricity grids, which are already under pressure from the growing energy demands of data centers.
According to GovTech, regional transmission operators (RTOs) like PJM Interconnection LLC, which serves 67 million people from Chicago to Washington, D.C., have issued emergency alerts as power demand reached unprecedented levels.

Impact & Risks

The heat waves are affecting millions of households and businesses, particularly in regions managed by PJM, MISO, and the Southwest Power Pool. High temperatures and humidity are driving up air conditioning use, straining power reserves and transmission systems. Data centers, especially in Virginia's 'Data Center Alley,' are compounding the issue with their 24/7 energy needs. Emergency alerts and federal permissions for backup generators highlight the severity of the situation. Experts warn that some grids, like PJM, may face worsening reliability issues in the coming years without significant investment in infrastructure.

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