A powerful nor'easter is impacting the U.S. East Coast, bringing heavy rain, strong winds, and coastal flooding. States of emergency have been declared in New Jersey and New York City due to the storm's severity. Coastal flood warnings are in effect from Florida to New England, with the storm expected to linger into Tuesday. The NYC metro area and Long Island are bracing for strong wind gusts, with potential for 2-3 inches of rain. Tidal flooding has already been reported in Delaware and southern New Jersey, with more expected. The greatest inundation is forecast during Monday's high tide. High surf and dangerous rip currents pose a threat to East Coast beaches. Damaging wind gusts may cause scattered power outages. Research indicates that the strongest nor'easters are intensifying, increasing the risk of extreme weather events.