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    Some in Midwest could see wind chills as low as 45 degrees below zero

    01:25
  • Strong storm system threatening weekend plans across the country

    00:51
  • Major cleanup underway after massive storm slams the East Coast

    02:06
  • Reconnaissance photos show extent of destruction on Tonga after eruption, tsunami

    01:05
  • Massive winter storm rips through US: What to expect

    01:24
  • Winter storm slams Northeast and South, causing thousands of flight cancellations

    02:10
  • Severe snow and rare ice storm expected to hit the East Coast

    01:40
  • Winter weather threatens Southeast as officials declare states of emergency

    01:31
  • Millions across U.S. under winter weather alerts

    01:22
  • Major winter storm moves across the US

    02:14
  • Heavy rain leads to deadly landslides, floods in southeastern Brazil

    00:46
  • Virginia mother in labor braves winter storm on foot to deliver baby

    02:14
  • How cold is it? See spaghetti, jeans, egg frozen in place

    01:03
  • Record-breaking cold weather freezes the Northeast

    03:18
  • Dangerous record temperatures blanket Midwest, Northeast

    03:11
  • Millions in U.S. under cold weather alert

    03:45
  • Frigid temperatures strike Midwest and Northeast

    03:10
  • At least 22 dead, including children, as snowstorm in Pakistan traps people in vehicles

    01:34
  • Millions across Northeast hit by winter storm

    01:27
  • Video shows multi-vehicle pileup on snowy Kentucky highway

    01:25

Extreme heat sweeps across the country

01:45

Record hot temperatures beat down on parts of the country. NBC News' Chris Clackum reports.