Today in the New York Times, Eric Asimov discusses drinking chilled, refreshing sauvignon blanc on these hot summer days.
With respect to wines made in the United States, sauvignon blanc is sometimes called fume blanc. There is supposedly a difference in style between, on the one hand, wine made with sauvignon blanc grapes and called sauvignon blanc, and on the other hand, wine made with sauvignon blanc grapes and then called fume blanc. Whether that difference is put into effect at a given winery, or whether the label is simply a marketing decision, may vary. But in the end, fume blanc is sauvignon blanc.