A powerful storm is creeping along the U.S. Northeast coast, causing high winds and knocking out electricity for thousands. The nor'easter is affecting the Mid-Atlantic area and New England. At one point, around 100,000 customers were without power on Saturday. The National Weather Service warns that high winds, tides, and heavy rain will continue through Sunday. In New Jersey, New York and elsewhere, some streets are flooded and some homes and businesses are inundated. The storm has led to flight cancellations and concert postponements and disrupted sports events. Officials are urging residents to use caution.