New York City's public transport system is to be suspended ahead of the arrival on Monday of Hurricane Sandy.
Governor Andrew Cuomo said the subway, bus and train services would shut down from 23:00 GMT on Sunday.
As many as 375,000 people have been ordered to evacuate low-lying areas, and schools will be shut.
Sandy's winds are set to intensify as it merges with a wintry storm from the western US. A number of states on the East Coast have declared an emergency.