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US and Canada braced for more snow storms

6 January 2014 Last updated at 05:23 GMT

Parts of the north-eastern United States and Canada are bracing themselves for more heavy snow and freezing temperatures, as a "polar vortex" envelops half of the continent.

Forecasters are predicting that parts of the Mid-West could see record-low temperatures in the coming days.

Wendy Urquhart reports.