1. Torrential rains trigger flash flood warnings in the Northeast, causing havoc.
1. New York City and parts of New Jersey affected by severe weather conditions.
1. Mayor Eric Adams and Governor Kathy Hochul declare a state of emergency in NYC.
1. Adams emphasizes heightened alertness and extreme caution for residents.
1. Urgent advice includes staying home and sheltering in place.
1. Extreme weather leads to subway delays, road closures, and flash flooding.
1. The New York City metro area experiences significant disruptions.
1. Ongoing coverage of the floods provided by USA TODAY.