Substation Causes Cascading Lights Out in Florida

A relatively minor glitch in Florida's electrical grid somehow triggered a chain reaction Tuesday that caused a nuclear plant to shut down and briefly cut power in patches from Daytona Beach through the Florida Keys. Up to 3 million people, about one fifth of Florida's population lost power at various points during the afternoon, though there were no safety concerns at the nuclear plant. And while many areas were hit hard, the outages were short lived and only about 20,000 people lacked electricity during the evening commute home.