Arctic blast continues to sweep entire US setting record-low temperatures

Sub-zero wind chills grip swathe of country as Arctic storms leave at least four dead and knock out electricity in parts of north-west

Dangerous freezing air from the Arctic continued sweeping across the US on Monday, prolonging a bitter cold blast that has set record-low temperatures and disrupted daily life across a broad swathe of America, including an NFL playoff game and the presidential nominating contest in Iowa.

From Oregon on the west coast to New York state on the east coast and all the way down to Florida, the US grappled with the effects of a weather system that hit tens of millions of people.