Each of the National Parks faces unique challenges from climate change, including increased heat.
Temperatures we think of as normal are getting warmer.
The monthly variability in the number of tornadoes has been increasing over the past 50 years.
While there are fewer days each year with tornadoes, on average, the number of days with more than 30 tornadoes is increasing.
A large majority of states will face an increased threat of inland flooding by mid-century.
Allergy season is getting longer and worse in a warming world with more carbon dioxide.
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.