Climate change is expected to intensify fire-friendly weather conditions across the US and to lengthen the fire season.
Last July, Lake Mead hit a new record low. How is the lake handling the summer so far?
Will global warming cause tourism at U.S. National Parks to warm up or overheat?
Globally, carbon emissions from fires were near the long-term average in 2014, but North America's emissions were 70% higher than average.
While slightly wetter than 2013, the global average soil moisture in 2014 was near-normal.
In 2014, the upper ocean held more heat than average throughout most of the major ocean basins.
In 2014, precipitation over land was generally below average, while precipitation over the oceans was above average.
Overall, average global river outflow in 2014 slightly exceeded the climate normal.
Scientists estimated global average carbon dioxide concentration at 397.2 parts per million (ppm) in 2014, as the global growth rate of carbon dioxide continues to accelerate.
Global warming is one symptom of the much larger problem of human-caused climate change.