US braced for 'historic blizzard'
A "potentially historic blizzard" could dump up to 90cm (3ft) of snow on the US north-east coast, the National Weather Service has warned.
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New York's mayor said the storm could be the city's biggest ever, telling residents to "prepare for the worst".
Heavy snowfall is forecast from Philadelphia to Maine, pre-emptively closing many schools and offices.
A blizzard warning has been issued across New York and Boston from Monday afternoon until Tuesday.
More than 250 flights on Monday and more than 2,300 on Tuesday had already been cancelled, according to the website FlightAware.
Boston's Logan Airport will close after 19:00 local time (00:00 GMT Tuesday) and will stay closed until Wednesday, local media reports.
The highest snowfall totals are expected along the 250-mile coastal stretch between Boston and New York, but more than a foot of snow is forecast for areas further west and south.
Credit: BBC
