New York Mayor Zohran Mamdani on Sunday ordered the shutdown of the city’s entire traffic network for all but emergency travel ahead of a massive snowstorm expected to hit the northeast United States. Tens of millions of Americans from the US capital, Washington, to the northern state of Maine braced for the storm, with up to 60cm (2 feet) of snow forecast in some areas. The National Weather Service said blizzard conditions would “quickly materialise” from Maryland up to southeastern New...