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Millions hunkered down for icy conditions expected to last through the weekend from Texas to Ohio to Tennessee as a cold snap covered much of the nation, knocking out power and making roads treacherous Saturday. Face-stinging sleet, thick snow and blustery winds led to slick road conditions, school closures and event cancellations as the wintry blast dropped temperatures to freezing and below overnight Saturday. A treacherous section of icy Interstate 35 about 50 miles north of Dallas has been closed intermittently for as long as five hours as tractor-trailers were unable to climb a hill and then clog the busy highway, Texas Department of Transportation spokeswoman Michelle Releford said Saturday. The backup can extend for miles. Three traffic-related deaths were reported, one in Arlington and two in Oklahoma. | 
