“The dramatic climate changes anticipated for the 21st century are so severe that the hydrology of the Western Arctic will intensify, with increased snowmelt rates, flooding, and thaw of permafrost.” That’s the assessment of Doctor John Pomeroy, director of the USask Centre for Hydrology and senior author of a recent paper for the American Meteorological Society’s “Journal of Hydrometeorology.” The paper presents the first detailed projections of major water challenges, by the end of the century, facing Western Arctic communities such as Inuvik, and transportation corridors such as the Dempster Highway running through Yukon and the Northwest Territories. Under a business-as-usual greenhouse gas emissions trajectory over the coming decades, the region will be 6.1 degrees Celsius warmer by 2099.