Northeastern States Warming will ease winter weather extremes, but bring more rain and possible flooding. Warming may exacerbate pollution from agricultural runoff in places like the Chesapeake Bay. Hotter summers likely, with more frequent and intense heat waves especially affecting cities. Forest species shift northward and maple trees may disappear. Some coastal urban centers may have to rework sewer, water and transportation systems because of sea level rise.
Mountain regions see decline in skiing and increase in other activities such as hiking.
Great Lakes States Water levels likely to decline because of increased evaporation, leading to reduced water supply. Shoreline damage likely to decrease, but lower water levels add to marine transportation problems. Cities along lakes must adapt to new water levels. Longer growing season and increases in carbon dioxide will cause higher crop yields and allow planting of more types of crops and in many cases more than one crop a year. Despite higher rainfall, warmer weather will increase evaporation, reducing lake and river water levels.