The Power Dissipation Index for hurricanes has been on the rise since 1970, along with sea surface temperatures.
The probability of a tornado touchdown somewhere in the U.S. jumps to nearly 80 percent in May and nearly 90 percent in June.
This season was the least active since 1982 and the sixth-quietest since 1950.
The peak of hurricane & tropical storm activity doesn’t usually come until Sept. 10. And, on average, there tend to be significantly more storms after the peak than before it.
The current level of understanding makes it hard to say for certain how climate change will influence Atlantic hurricanes in the future.
As the graphic shows, people cause most wildfires. But lightning-ignited fires burn by far the most territory.
Record highs have outpaced record lows by a bigger margin each decade since the 1960s.
The highlights of NOAA's 2013 Spring climate summary.