3:00pm

Fri September 9, 2011
NPR Story

How One Mistake Can Leave Millions Without Power

San Diego's power company has restored power to all of its customers. Thursday afternoon, more than 4 million people in the Southwestern U.S. and parts of Mexico lost electricity. Arizona Public Service Company says the outage occurred after an electrical worker mistakenly removed a piece of monitoring equipment at a substation in southwest Arizona.

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