The nor'easter is causing significant flooding in parts of the East Coast, particularly in New Jersey, where streets have been submerged. Coastal areas are at risk of damage from the 'mammoth waves' warned about by New York Governor Kathy Hochul. The combination of heavy rainfall and strong winds could lead to power outages, transportation disruptions, and property damage. Residents in low-lying and coastal areas are particularly vulnerable to the storm's impacts, and emergency services are on high alert to respond to potential crises.