Each of the National Parks faces unique challenges from climate change, including increased heat.
April 2016 was the hottest April on record globally.
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.
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.