Subway, PATH, Metro-North and LIRR service will all be disrupted. All city roads will close at 11 p.m.
Christmas Day is expected to be a balmy 46 degrees.
Forecasters predicted the city could see as much as 10 inches of snow on Sunday through Monday.
Forecasts for Wednesday predict temperatures to rise close to 60 degrees.
As Hurricane Sandy moves toward the city, New Yorkers can take steps to protect their homes.
An extreme heat advisory was issued in New York as temperatures climbed to 100 degrees.
A heat advisory will be put in place Saturday.
After a short reprieve, New Yorkers can expect more hot weather on Thursday, and through the weekend.
A flood watch was in effect until Monday morning for New York City.
Thursday's 78-degree weather was the highest temperature on record for March 22.
Snow is predicted Friday night into Saturday.
Temperatures were expected to climb only into the mid 20s on Sunday.
Up to an inch of rain could fall during the storm Wednesday night into Thursday morning.
The weather is expected to be mild at midnight for the New Year's Eve ball drop in Times Square.
There's a chance that flurries and sleet could hit Manhattan Friday — but it will warm up by Christmas.
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