A massive power outage threw San Francisco into chaos for most of the work day on Friday. Wells Fargo & Co closed 13 bank branches and four office buildings, while the New York Stock Exchange said its ARCA options trading floor in San Francisco was briefly unavailable. San Francisco International Airport remained operational, and a US Department of Homeland Security spokesperson said there was no evidence of terrorism. "The real question is how could one substation take out, effectively, San Francisco?" Twenty-one San Francisco schools lost power, but remained open nonetheless, according to a Department of Emergency spokesman.

Source: The Star April 22, 2017 01:41 UTC