Scorching heat forecast threatens demand records on US electric grid
A scorching heat wave is forecast to push US electric grids to record demand levels across the East Coast and Midwest, straining systems due to increased air conditioning, data centers, and electric vehicles. Grid operators like PJM, NYISO, and MISO are forecasting high demand, with PJM highlighting the unprecedented load from hyperscale data centers. This situation creates a thin buffer against outages and causes transmission line congestion.
A blistering heat wave across the U.S. East Coast and Midwest is expected to push electricity demand to record levels this week, significantly straining the nation's power grids. Grid operators attribute this surge to increased air conditioning use, as well as the escalating energy consumption from data centers and electric vehicles. Temperatures are forecast to exceed 100°F in areas from Boston to Washington D.C., including Northern Virginia's major data center hub.
PJM Interconnection, which serves 67 million customers in the Mid-Atlantic, South, and Washington D.C., projects record summer demand of 166.3 gigawatts for Thursday evening, surpassing its 2006 record. Similarly, New York ISO anticipates peak demand nearing 32 GW, and the Midcontinent Independent System Operator (MISO) expects demand to challenge its 127.1 GW record across 15 Midwest and Southern states. To manage the demand, MISO may rely on PJM's resources.
PJM executives expressed concern over a "fundamental mismatch" between rapid demand growth and the slower pace of new energy supply development. In a May report, PJM highlighted the unprecedented load added by hyperscale data centers, accelerated retirements of older generation plants, and increased time and cost for building new power plants. This situation leaves the grid with a thin buffer, leading to issues like high real-time wholesale electricity prices due to congestion on transmission lines, as observed on Monday evening.