A massive power outage Friday shut down much of San Francisco, with local authorities estimating that 90,000 consumers – roughly 1 in 10 residents – were left with without electricity.
Earlier in the day, an outage also hit New York, where subway riders found their commutes temporarily halted.
In an early assessment, authorities found no indication the outages were coordinated or related. Officials suspect aging infrastructure is likely to blame. A fire was reported at one area substation, but officials have not said whether that precipitated the outage, according to a San Francisco Chronicle report.
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