Each of the National Parks faces unique challenges from climate change, including increased heat.
Temperatures we think of as normal are getting warmer.
While there are fewer days each year with tornadoes, on average, the number of days with more than 30 tornadoes is increasing.
Allergy season is getting longer and worse in a warming world with more carbon dioxide.
If the first three months of 2016 are any indication, meeting the 1.5°C challenge will be increasingly difficult.
Since the first Earth Day in 1970, the average annual temperature in every state has climbed.
The rapidly warming Arctic is already impacting Alaska, as earlier ice breakups on the Tanana River are more likely.
This year’s early Western spring snowpack is higher than previous years, but remains on a long-term downward trend.