The first full day of winter brought wild weather across North America and the threat of storms in Britain.
In the United States, ice and high wind hit the upper Midwest and northeastern New England states and there was flooding in the South.
Freezing rain across much of eastern Canada turned roads and pavements into skating rinks and wreaked havoc with holiday plans.
Snow and ice knocked out power to 400,000 homes and businesses in Michigan, upstate New York and northern New England, and also left more than 475,000 customers without electricity in eastern Canada.
At least nine deaths were blamed on the storm in the US, including five people killed in flooding in Kentucky, three traffic deaths on slick roads in Oklahoma, and a woman who died after a tornado with winds of209km/h struck in Arkansas. Five people were killed in eastern Canada in road crashes. In Toronto, warming centres were set up and the tram service and parts of the subway system were shut down. The giant Yorkdale Shopping Centre lost power.