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

Flooding is possible across the Northeast and the Mid-Atlantic on Thursday, especially in urban areas, with storms expected to bring heavy rain — up to 3 inches per hour.

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

At least 22 people have fallen ill, including one person who has died, from Legionnaires’ disease in New York City over the last two weeks, according to the city’s health department. City health officials believe that the people most likely became ill after breathing in bacteria sprayed from a cooling tower in central Harlem.