This is the shocking moment a subway station in Brooklyn was overwhelmed by floods as heavy rain pounded New York City.

Footage captured by Igor shows distressed travellers climbing on the railings to avoid the deluge.

Others were seen wading through the submerged transit hub as rainwater poured from the walls, quickly flooding the station on July 31.

Torrential rain and thunderstorms swept across the region on Thursday, prompting flash flood alerts and causing widespread disruption to transport services.

A state of emergency was declared for New York City and neighbouring parts of New Jersey.

Authorities urged residents to avoid unnecessary travel and remain prepared for continued rainfall into Friday.