What to KnowMore rough weather is expected to slam the tri-state area through Monday night, bringing rainfall rates up to 2 inches an hour at times, which could pose major problems for transit and power.There’s been a significant shift in the flash flood threat for today and tonight. The flood thr eat has diminished somewhat for NYC and NJ; it’s highest north and east of the city, including LI and CT. It comes on the heels of a third straight day of storms, some of which brought hurricane-force gusts to parts of Long Island; trees came down. Debris could clog drains and sewers, making matters worse. Flood watches remain in effect tri-state-wide as excessive rainfall continues. Those could escalate. Check the latest weather alerts for your neighborhood here. In NYC, Mayor Zohran Mamdani urged people to prepare for flash flooding potential; he suggested NYers limit travel if they can Monday, plan for delays, and take alerts seriously. NJ Transit has already seen storm impacts; the NYC subway system is prepared to handle up to 1.75 inches of water an hour; a 2-inch-an-hour clip could flood it The slow-moving but powerful storm system that hit the tri-state area Sunday night after nearly a week of stifling heat continues to thrash the region Monday, with Long Island and Connecticut set to get hammered as rainfall rates up to 2 inches an hour threaten to overwhelm NYC subways. Flood threat maps saw a significant shift overnight. Isolated rainfall totals up to 6 inches are possible by the time the system moves out. Meanwhile, cleanup from the weekend storms is ongoing. Track the latest weather developments in our live blog below. ...read more read less