This is how hot the United States could be in the future.
Summers are getting hotter across most of the country.
Climate change is causing leaves to emerge earlier in the year. See how far ahead they are this year.
These U.S. cities had their warmest winter on record.
The season and area in which trees are tapped to produce maple syrup is warming from climate change.
Parts of the U.S. may see 90 percent fewer days mid-century with average temps below 32°F.
Here's which cities might get a white Christmas based on historical records.
Each of the lower 48 states is having one of its 10 hottest years on record.