The full report, available here (PDF), also breaks down the effects into various regions of the United States. The Northeast corridor from Washington, DC, to Boston, for example, faces 15 additional days of 95-plus degree heat by 2041.
The report is backed by existing observations, computer models of future trends and the best science available.
"Long-term, independent records from weather stations, satellites, ocean buoys, tide gauges, and many other data sources all confirm the fact that our nation, like the rest of the world, is warming, precipitation patterns are changing, sea level is rising, and some types of extreme weather events are increasing," the report stated. "These and other observed climatic changes are having wide-ranging impacts in every region of our country and most sectors of our economy."
The draft report goes out for public review and comment through April 12. It's likely that the new Congress will also get a chance to quiz the scientists behind the report – although chances for a climate change bill that would cut carbon emissions, for example, remain doubtful.