A student carries her cross country skis into Washburn High School as the school sign indicates a sub-zero temperature in Minneapolis, January 8, 2014. Schools in Minneapolis reopened after being ... more 
A student carries her cross country skis into Washburn High School as the school sign indicates a sub-zero temperature in Minneapolis, January 8, 2014. Schools in Minneapolis reopened after being closed for two days due to dangerously low temperatures and wind chills. A deadly blast of arctic air shattered decades-old temperature records as it enveloped the eastern United States on Tuesday, snarling air, road and rail travel, driving energy prices higher and overwhelming shelters for homeless people. According to AccuWeather.com, the extreme cold won't last much longer. The frigid air and "polar vortex" that affected about 240 million people in the United States and southern Canada will depart during the second half of this week, and a far-reaching January thaw will begin, according to AccuWeather.com. REUTERS/Eric Miller (UNITED STATES - Tags: ENVIRONMENT EDUCATION) less 
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Reuters | Photo By ERIC MILLER / REUTERS
Wed, Jan 8, 2014 4:42 PM EST