Hi Dick, I'm in the northern part of Jersey, and live on a hill so the water is not a concern but the wind could be. This area is supposed to get 3-5 inches of rain so I'm not too worried about that. I built the roll off about 8 years ago and this is the second time we had to worry about high sustained winds. After the last one I purchased a portable (they call it portable but I can roll it about 20 feet from the garage) 17,000 watt generator with a patch panel to keep the essentials running ( well water pump, furnace etc) in the house.
Be safe