FILE - In this Tuesday, Jan. 21, 2014 file photo, tourists walk through the snow-covered Empty Sky Memorial at Liberty State Park in Jersey City, N.J. Researchers who analyzed local climate trends and hospital records on millions of Americans say there may be a link between weather and the risk for stroke. Cold weather, high humidity and big daily temperature swings brought more stroke hospitalizations. The study by researchers from Yale, Harvard and Duke universities was discussed Wednesday, Feb. 12, 2014 at a stroke conference in San Diego. (AP Photo/Julio Cortez)There could also be a hyperlink between climate and the risk of suffering a stroke, say researchers who analyzed local weather tendencies and clinic data on hundreds of thousands of Americans.