Even with the big swings of Halloween weather from year to year, Octobers are warming across the U.S.
A graphical look at the top indicators of a warming world.
The relentless heat that has plagued the western half of the country this summer has ratcheted up California’s terrible drought once again.
Record lows are outpacing record highs since last year. This is becoming rarer in a warming world.
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.
The amount of carbon dioxide in the atmosphere has a strong correlation with rising temperatures.
April 2014 was the first month in human history with average CO2 levels above 400 ppm.