Each of the National Parks faces unique challenges from climate change, including increased heat.
An early spring can disrupt plant & animal behaviors and make it more difficult on farming.
On the current greenhouse emissions path, spring may start an average of three weeks earlier by 2100.
Take a look at how cold nights have been trending for various cities across the U.S.
Volatile precipitation patterns, with heavy rains followed by drought, can lead to ideal conditions for wildfires in some states.
With drought, increasing water consumption, and climate change, the Colorado River Basin Ã¢Â€Â” lifeblood of the Southwest Ã¢Â€Â” appears headed for a day of reckoning.
Glen MacDonald, of UCLA, talks about the threat of drought in the Southwest and what it means for water supply.
Lake Mead is at a record low level, a stark symbol of increased water demand and a stubborn drought in the West. Will conditions persist and the reservoir sink farther? Scientist David McGee reveals how he looks for the answers by studying past dry spells.