Before the expected arrival of the tropical storm "Elsa" in New York, several subway stations in the metropolis were flooded by heavy rain.
Metro users published video recordings on Thursday (local time) showing the floods.
At 157th Street Station in north Manhattan, the water was up to the waist for some passengers.
NWS warned of further heavy rains and floods.
Lines 1 and A of the metro are badly affected by the floods, said the head of the New York transport company, Sarah Feinberg, at a press conference on Thursday evening.
The heavy rain accompanied by heavy thunderstorms also led to road closures in several parts of the city.
Main traffic arteries also had to be cut off from the rest of the transport network, especially in the Bronx district.
Many drivers were stranded while driving, as can be seen in pictures that the New York police published on Twitter.
Surrounded by water, New York is considered extremely vulnerable to flooding.
After the devastating Hurricane "Sandy", in which 44 people were killed in New York in October 2012, the authorities had taken measures to better protect the city from extreme weather conditions.
However, in the face of the recent flooding, numerous local politicians have called for further investment in infrastructure, including Brooklyn mayor Eric Adams, who is also the favorite in New York's mayoral election in November. In addition, the outdated New York subway is seen as ailing and in need of renovation - and a prime example of the ailing infrastructure in the United States.