More than a million people in the US are in the dark after a “bomb cyclone” winter storm struck the country, closing highways, grounding flights and causing misery for Christmas travellers. Heavy snow, howling winds and air so frigid it instantly turned boiling water into ice took hold of much of the country, including normally temperate southern states. More than 200 million Americans were under weather warnings, as wind chills sent temperatures down as low as -55F (-48C), according to the National Weather Service (NWS). In Hamburg, New York, 39-year-old Jennifer Orlando hunkered down with her husband. “I can’t see across the street,” she told AFP. “We’re not going anywhere.”…