Torrential rain pummeled parts of the Northeast on Thursday, including New York City and New Jersey, stranding rush-hours passengers on a train.

But as the heat lingered into the evening, the service began posting flood watches. By the afternoon of July 31, more than 50 million people in the region are forecast to be under a flood watch.

New York Mayor Eric Adams declared a local state of emergency until tomorrow morning because of heavy rain and flooding, and he warned those in baseme

Severe thunderstorms across Maryland on Thursday brought torrential rainfall reaching up to 6 inches in some areas, causing thousands to lose power and requiring several water rescues in Harford County after multiple cars were trapped by rising water.

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.