Do you live near the ocean? If so I'm surprised by this comment - it's not the wind or the rain that make this storm so dangerous (although the duration due to the size will be unusual) It's the storm surge and flooding. At high tide you're looking at 6-11 feet in some parts of NYC. If it hit the high side of that the subways and underground conduits will fill with seawater. I probably don't have to explain why thats a really, really bad thing.