New York City and New Jersey are under states of emergencies as torrential rain pounds the Northeast on Thursday afternoon.

Heavy rain is expected to bring dangerous flooding, disrupt commutes and trigger emergency measures across the region.

New York Governor Kathy Hochul and her acting counterpart in New Jersey said they were declaring states of emergency for areas facing the threat of extreme flash floods forecast on Thursday for much of the Eastern Seaboard.

New York City officials said they are investigating a cluster of Legionnaires' disease that has caused one death and nearly two dozen illnesses.

One person is dead and at least 22 people have become sick from a Legionnaires’ disease cluster in New York City since last Friday, health officials said.

Legionnaires' disease can be fatal, especially for older adults, smokers and those with weakened immune systems.