The heavy rainfall poses a significant risk of flash flooding, particularly in low-lying and urban areas. Travel disruptions are likely, with hundreds of flights already canceled at major New York airports, including JFK, LaGuardia, and Newark. The Catskills could see up to 6 to 8 inches of rain, further increasing the risk of hazardous conditions. Residents in flood-prone areas are advised to remain vigilant and prepared for potential evacuations.