Four swimmers have drowned and three are missing in two days of treacherous ocean currents off beaches on Long Island and New York City. The missing include a 10-year-old girl who had been playing in the water off Coney Island. Officials say at least three people were rescued. The National Weather Service says the rough seas were due to a strong storm system that brought eight-foot waves to the area last week. Some authorities say the spate of swimmers being swept away seems unprecedented. In the Long Island community of Long Beach, where two people drowned and another disappeared, a police lieutenant says he can't recall there ever being back-to-back drownings.