Halfway through 2018, the U.S. is having its 14th warmest year on record, with the Southwest leading the way.
The global ocean conveyor belt is slowing down, impacting climate, sea levels and marine life.
See the trends in minimum and maximum summer temperatures on this map.
2017 was the third warmest year in the global record. See how each continent ranked.
Globally, 2017 was the third warmest year on record. See what parts of the world were warmest.
There have been 15 billion-dollar weather-related disasters in the U.S. in 2017, and the year may finish as the costliest on record.
The Northern Plains, Great Lakes, and the Northeast are warming the fastest, while warming is taking place at a slower rate in the western U.S.
Lyme disease is increasing in the Northeast, and is likely to spread to other areas as the world warms.