In early April high precipitation levels caused flooding on the Unadilla River, along the border of Chenango and Otsego counties.

The Nine Mile Swamp lies along the banks of the Sangerfield River in Oneida and Madison counties. It is the largest wetland complex in the Upper Susquehanna River Basin, comprised of a diverse mixture of northern white cedar swamp, floodplain forest, emergent marsh, and rich fens.