Firefighters battle flames at a home Friday near Weed, Calif. California on Monday faced its greatest risk of blackouts so far this summer, officials said, as soaring temperatures stressed the power grid and rapidly spreading wildfires killed two over the weekend. A historic heat wave combined with dry and windy conditions across much of California has set the stage for possible rolling blackouts and wildfires, which have sent thousands fleeing their homes in the northern part of the state. State officials anticipate a shortfall of power supplies on Monday and Tuesday. The California grid operator ratcheted up calls for residents and businesses to limit their power use, saying it would need two to three times as much conservation and over a greater number of hours to avoid blackouts. Conservation by California residents and businesses has helped the state squeak by without blackouts so far across five days of high […]