2015 set to be hottest year on record by large margin

Just one year after 2014 set a record as the hottest year in the historical record, 2015 is on track to beat it by a large margin, possibly signaling a return to a sustained period of rapid global warming.

The National Oceanic and Atmospheric Administration, a federal agency that tracks worldwide temperatures, announced Wednesday that last month had been the hottest September on record and that the January-to-September period had also been the hottest since 1880. Scientists say the mathematical odds are now overwhelming that the full year will be the hottest ever recorded.

http://www.startribune.com/2015-set-to-be-hottest-year-on-record/335293971/