Power supply to about 150,000 California homes and businesses is expected to be shut off on Wednesday, in the latest precautionary outage planned by utility giant PG&E against wildfire risks posed by extremely dry, windy weather.  Late on Tuesday, the company said it would go forward with the shutoffs from 9 a.m., with some customers likely to be unaffected until late afternoon. The mass blackout will be the fourth imposed by Pacific Gas & Electric Co, a unit of PG&E Corp, since Oct. 9, when about 730,000 customers were left in the dark as a preventive measure called a “public safety power shutoff.” A precautionary outage initiated on Oct. 23 hit an estimated 179,000 customers, while another […]