As temperatures rise and energy challenges mount, advocates are looking to renewable projects to ease the growing strain.By Lauren DalbanNEW YORK—When nearly 10,000 people in Southeast Queens lost power during a July heatwave, Mayor Zohran Mamdani called on residents to keep their air conditioners at 78 degrees to reduce the pressure on the grid. The New York Independent System Operator, which manages the state’s electricity grid, issued an energy watch the same month, but it wasn’t the first time it sounded the alarm.