Millions facing power outages as heat wave overwhelms California energy grid

The alert ordered the first rolling outages in the state in nearly 20 years.Power was cut to 410,000 homes and businesses Friday for about an hour at a time by three of the state's largest utilities — Pacific Gas & Electric, Southern California Edison and San Diego Gas and Electric, NBC Bay Area reported.San Diego Gas and Electric issued a statement Monday urging customers to conserve energy as weather conditions could force more widespread outages in the coming days."The heatwave is forecasted to continue through Thursday, and CAISO is anticipating a significant shortfall in energy supply needed to meet the exceptionally high energy demand," the statement said.Download the NBC News app for alerts and all the latest on the Democratic convention.Newsom sent a letter dated Monday to the California ISO and the California Energy Commission requesting an investigation."Residents, communities and other governmental organizations did not receive sufficient warning that these de-energizations could occur," Newsom wrote.