India, Oct. 11 -- A nor'easter, a powerful coastal storm, is forming off the Southeast US and is expected to bring treacherous seas, torrential rain, and tropical hurricane-force wind gusts to most of the East Coast until the first part of next week.

As it intensifies and shifts north, the storm will be quite powerful. Aside from the heavy rain and perhaps destructive wind, it will cause significant coastal flooding that could flood houses and roads and erode beaches.

Strong winds are predicted to cause delays and cancellations by Monday, making it an absolute nightmare for air travel in key hubs like Boston, New York City, Washington, and Washington, DC.

Acting Governor Tahesha Way declared on Friday that a state of emergency would be...