Compared with the median ice cover from 1981-2010, 2013's Arctic sea ice loss comes out to approximately 1.74 times the land area of Texas.
As the graphic shows, people cause most wildfires. But lightning-ignited fires burn by far the most territory.
The highlights of NOAA's 2013 Spring climate summary.
A snapshot of how 2012 stacks up against the five other warmest years ever recorded in the U.S.
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.
In 2006, wildfires burned seven million acres in the West, the equivalent area of five of the country's largest national parks.
In a desert state like Nevada, heavy rains promote plant growth but can lead to more wildfires.
In a forested state like Montana, hotter and drier years leave forests more susceptible to large wildfires.