New Delhi, Dec. 21 -- The city of San Francisco plunged into darkness on the intervening night of Saturday and Sunday, with nearly a third of the city being affected by a power outage.

As the outage hit, more than 130,000 houses and businesses were left without power, mostly in the northwest part of San Francisco, while transportation in the city, including self-driving cars, grinded to a halt.

Some parts of the city, such as Richmond, Sunset, Presidio, and Golden Gate Park, were among the worst hit.

As of early Sunday morning, nearly 30,000 people in San Francisco were still without power, as per PowerOutageUS.

Media reports said that hundreds of businesses had shut shop temporarily due to the outage.

Self-driving cars also grinded ...