As summer heads to a close, a potentially record-breaking heat wave is predicted to blanket California this weekend and cause electricity demand to soar. The California Independent System Operators was projecting a peak demand of 42,225 MW on Sept. 12 heading into the weekend, up from a forecasted peak of 40,225 MW Sept. 11. “We have had hot September days in the past and so this one is not unusual and is about normal in terms of what we would see for summertime conditions,” said Steven Greenlee, grid operator spokesperson. He said resources should be adequate to handle the heat wave. Meanwhile, the National Weather Service predicted that temperatures in inland areas easily would zoom past the century mark and stay high into next week. The hottest days are supposed to be Sunday and Monday. “We’ll be looking at widespread triple digit highs in the valleys and 80s and 90s for most coastal zones,” wrote Weather Service meteorologists. Temperatures are expected to range between 107 and 110 in the warmest inland valleys. The Weather Service added, “This puts many locations near record-breaking territory.” A gradual cool down is expected to take place over the remainder of next week, according to forecasters.