Jul. 9—During a recent heat wave, PJM Interconnection, the Midwest’s electric grid operator, found itself operating at 163,000 megawatts, flirting with the grid’s all-time peak usage record of 165,000 megawatts. “That’s pretty close to our all-time peak usage,” said Asim Haque, PJM Interconnection’s senior vice president of governmental and member services (and a former Springfield resident). …