Gov. Kathy Hochul declared a state of emergency across much of the New York City area Friday after torrential storms flooded the Big Apple’s subways and streets.

The downpours hit hardest across parts of Brooklyn with more than 3 inches of rain falling in a single hour, according to data from the state meteorological arm. That’s triple the amount state officials said yesterday they expected the storms were expected to produce at their zenith.

“I am declaring a State of Emergency across New York City, Long Island, and the Hudson Valley due to the extreme rainfall we’re seeing throughout the region,” said Hochul, in a post to Twitter, which is now formally known as ‘X’. “Please take steps to stay safe and remember to never attempt to travel on flooded roads.”

Subway service was badly disrupted by the flooding. The MTA nixed service entirely on the B, G and W lines. Additionally, Service between Brooklyn and Manhattan was suspended on the No. 2, 3, 4, 5; C, D, F lines. Portions of the N were suspended too, while the Q was diverted to run via the R.

There were extensive delays across the rest of the system.

The disruption caused by the flooding below ground was matched above ground too.

Traffic cameras and footage broadcast by NY1 showed extensive flooding along the FDR and Brooklyn-Queens expressways.