By ALESSANDRO MARAZZI SASSOON Power was restored for tens of thousands of electricity customers in San Francisco late Saturday, after an hourslong outage affecting nearly a third of the city left many neighborhoods in darkness by nightfall. About 24,000 of the city’s 414,000 customers were without power as of 1:30 a.m. Sunday, down from about 124,000 early Saturday evening, according to the site PowerOutage.com. Pacific Gas & Electric, the utility serving the city, said on social media that...