Cities on the east coast of the US, including New York and Boston, are bracing for up to 60cm (20in) of snow as a major winter storm approaches.
Wind gusts of up to 80km/h (50mph) are forecast for several days creating blinding, blowing snow.
The National Weather Service says snow is expected to begin in parts of Pennsylvania, New York state and New England.
New York City has declared a state of emergency.
Non-essential travel is restricted. Mayor Bill de Blasio announced that the winter storm will be dangerous with heavy snowfall and strong winds.
Schools will be closed and coronavirus vaccinations re-scheduled. About three-quarters of flights into John F Kennedy Airport have been cancelled.
New Jersey Governor Phil Murphy has also declared a state of emergency, giving authorities the ability to shut roads and evacuate homes.
He has also suspended all public transport throughout the state on today.