Heatwave Strains U.S. Electric Grids, Raising Blackout Risks
A severe heatwave is placing immense stress on the largest U.S. electric grids, with the Department of Energy warning of heightened blackout risks. The PJM Interconnection, serving 67 million people from Washington, D.C., to Chicago, is under a 'maximum generation emergency' alert, requiring backup generation resources to stabilize the grid. Temperatures in major cities like Chicago, St. Louis, and Washington, D.C., are expected to exceed 90°F (32°C), driving electricity demand to near-record levels. The Midcontinent Independent System Operator (MISO), covering 15 states in the Midwest and South, predicts peak demand to approach 121 gigawatts, close to its all-time high of 127.1 GW. Tight conditions and increased reserve requirements are being implemented to prevent outages.