What is 2014 North American polar vortex?
[[File:Steam Rising from Chicago River.jpg|thumb|right|200px|The [[Chicago River]] during the polar vortex]] The '''2014 North American [[polar vortex]]''' was a weather system that caused extremely cold weather through [[Canada]] and the [[United States]].<ref>{{cite web|title=Historic Freeze|date=6 January 2014 |publisher=[[CNN|CNN News]]|url=http://edition.cnn.com/2014/01/06/us/winter-weather/index.html|access-date=January 6, 2014}}</ref> [[Freezing]] temperatures went all the way down to [[Nashville, Tennessee]]. Several cities broke records: [[Chicago]] [[O'Hare International Airport]] set a record on 6 January with a temperature of {{convert|-15|F}}, beating the {{convert|-14|F}} record in 1884 and 1988.<ref>{{cite news|title=The Coldest Temperatures in Decades|work=The [[New York Times]]|date=6 January 2014 |url=http://thelede.blogs.nytimes.com/2014/01/06/polar-vortex-brings-coldest-temperatures-in-decades/?hp&_r=0|access-date=January 6, 2014}}</ref> There were also [[power cut|power failures]] throughout Canada and United States. One in [[Newfoundland]] on 5 January took out the power of 190,000 customers.<ref>{{cite web|title=Power Restored to Majority of Customers|date=6 January 2014 |publisher=CTV News|url=http://www.ctvnews.ca/canada/power-restored-to-majority-of-customers-in-newfoundland-1.1619173|access-date=January 6, 2014}}</ref> Almost 24,000 people lost [[electricity]] across [[Missouri]], [[Illinois]] and [[Indiana]]. In [[Minnesota]], Governor [[Mark Dayton]] ordered all schools closed down due to weather.<ref>{{cite web|title=Governor Orders Schools Closed Monday over Cold|publisher=[[CBS|CBS News]]|url=http://minnesota.cbslocal.com/2014/01/03/record-breaking-cold-temps-in-northern-minnesota|access-date=January 6, 2014}}</ref> Across Indiana, over fifty of the state's ninety-two counties ordered roads closed to all traffic except emergency vehicles, mostly north of [[Indianapolis]].<ref>{{cite web|title=DHS County Travel|publisher=[[Indiana]] DHS|url=http://www.in.gov/ai/dhs/travel_advisory.