Footage shows the extent of Storm Fern's impact across the US – video

The powerful winter storm has been linked to at least 30 deaths, with more than 200 million people under cold alerts as of Monday morning. More than 670,000 power outages were reported across the country on Monday evening. Major institutions in New York City and Washington DC closed on Monday, including the New York Public Library and the National Zoo. New York City public schools had also shifted to remote learning on Monday.

• US winter storm: at least 30 people dead and nearly 200m under cold alerts