Record highs have outpaced record lows by a bigger margin each decade since the 1960s.
The number of big fires has shot up since 1970, with the largest number occurring during the years with the highest temperatures.
A snapshot of how 2012 stacks up against the five other warmest years ever recorded in the U.S.
From Hurricane Sandy to record heat, here is our list of the top 10 extreme weather and climate events of 2012.
You knew it was warm last month, but today it's official: it wasn't just warm; it was the warmest March ever recorded in the U.S.
A look at which states were hit hardest by extreme climate and weather events in 2011.
The average temperature in Moscow during June, July and August 2010 was significantly hotter than any year since 1950.
The average temperature in Moscow during July 2010 was significantly hotter than any year since 1950.