The California Independent System Operator on July 21 declared a Stage 2 electrical emergency in Southern California as temperatures soared to 100 degrees in some inland valley locations and more than 2,000 MW of local generating capacity tripped off line because of equipment failures.\t\t The Stage 2 emergency prompted Southern California Edison to curtail 324 MW of load at 2:39 p.m. by remotely shutting down the air conditioning systems of 155,000 customers who voluntarily agree to conserve in exchange for reduced electricity rates during the heat of the afternoon. Utilities up and down the state appealed for conservation.\t\t The grid operator declares a Stage 2 emergency when reserve generating margins reach, or threaten to reach within two hours, 5 percent or less.\t\t The operator had forecast a new all-time statewide peak demand for electricity of 45,701 MW on July 21 after Southern California Edison experienced a new record peak in its service territory of 21,110 MW on July 20, surpassing its previous record of 20,762 MW set last summer. Edison's peak hit an even higher 21,800 MW on July 21.\t While statewide demand fell short of the grid operator's forecast, it still hit a near-record high, topping out at 44,651 MW statewide. The grid operator forecast an even higher peak demand today, July 22,45,754 MW statewide. The previous statewide record peak was 45,597 MW last September.\t\t Unplanned outages occurred at some major power plants south of Path 15, according to grid operator records. Afternoon outages July 21 totaled 2,220 MW, including the loss of 668 MW at AES Alamitos, 354 MW at AES Redondo Beach, 170 MW at Reliant Etiwanda, 741 MW at Reliant Ormand Beach, 240 MW at Edison Mohave, and 47 MW at Wildflower Energy's Indigo Peaker.