Rare and unusual snow and ice in the US have led to three states calling a state of emergency. <br /><br />Louisiana, Mississippi and North Carolina have been hardest hit by the arctic vortex. Drivers there were told to stay off the roads. <br /><br />In Atlanta, Georgia, miles of snow-covered motorways packed with hundreds of stranded motorists waited hours for the traffic to clear.<br /><br />In Washington, the National Gallery’s ice rink closed. Officials said it was too cold for skaters to be out on the ice.<br /><br />The cold snap is part of an arctic front that’s put millions of people under weather warnings.<br /><br />Across the Deep South, the deep freeze could make temperatures feel as cold as minus 34 degrees Celsius.
