Parts of the US and Canada have been brought under heavy snow and ice after being hit by a major winter storm, putting more than 80 million people under weather warnings.
Thousands of flights have been cancelled and more than 145,000 people in south-eastern states are without power.
States of emergency have been declared in Virginia, Georgia and North and South Carolina.
Snow and ice could result in “dangerous travel, power outages, and tree damage”, the US National Weather Service (NWS) warned.
Highway patrols reported hundreds of vehicle accidents, according to the Associated Press news agency.
There were also forecasts of possible coastal flooding in some areas, including in New York City and parts of Connecticut, with warnings that roads and infrastructure could be affected.
