People in the Bay Area are struggling to keep from overheating and PG&E crews are scrambling to keep the power flowing. The utility said yesterday it has 150 crews out responding to power outages set off by the extreme heat. At one point yesterday, more than ten-thousand homes and businesses in the East Bay had no electricity. The state agency that oversees California’s bulk electric system, transmission lines, and electricity market has put out a statewide alert for voluntary conservation of electricity. The California Independent System Operator says don’t set your air conditioner lower than 78, and use big appliances only in the morning and after 9 p.m.