The California ISO (who run the electric grid) have called for voluntary conservation efforts to reduce electric demand today (Thursday, 8/9/12) between the hours of 11:00 am and 6:00 pm. (Update: Now extended through Sunday, 8/12/12.) The requested changes are: Turn off unnecessary lights, postpone using appliances, and turn up your thermostat to 78 degrees. The heat is placing heavy demands on the electric grid, and small changes could help. See the California ISO status page or the FlexAlert Warning Page for details.