Human-caused climate change is creating more coastal flood days in the U.S.
On average, football season has been warming nationwide since the first Super Bowl.
Regardless if Punxsutawney Phil sees his shadow or not, spring is coming earlier across the U.S.
2015 was the hottest year on record by a wide margin.
The average number of very cold nights each year has declined across much of the country since 1970.
2015 was the 2nd hottest year on record for the U.S.