Spring is arriving earlier across the U.S. by an average of three days.
If it seems like autumn leaves are taking longer to change color, you're not imagining things. Over the past 25 years, the onset of autumn has shifted.
A look at which states were hit hardest by extreme climate and weather events in 2011.
Based on the 2010 Census and Climate Central's map analysis, climate change-related sea level rise has put more New Yorkers at risk of flooding from Hurricane Irene.
A visual look at six plant species that are already being affected by climate change.
Photos from one of the worst tornado seasons to ever hit the U.S.
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.