New York City was buried under 11.4 inches of snow last weekend during the biggest winter storm in years. With few places to put it, the city turned to an unusual tool: snow melters. With snowbanks eating up curb space and piling up at intersections, city officials have turned to heavy-duty snow melters, massive machines that can turn truckloads of snow into water. Online, some people have nicknamed them "snow hot tubs." The concept is simple: snow is dumped into a heated tank, melted down,