Cars run on a highway during a blackout in the San Francisco Bay Area, California, the United States, Oct. 28, 2019. The Pacific Gas and Electric Company (PG&E), a main electricity power supplier in California, conducted a round of Public Safety Power Shutoff from Saturday, which impacted a total of 940,000 customers in 36 counties across the state. The company said it is a measure designed to reduce the threat of wildfires that could be sparked by lines brought down in gusting winds. (Xinhua/Wu Xiaoling)