You don't need science to tell you it's been really crazy hot lately in much of the United States. But seriously, it's been really stinking hot. How hot? Well, the last 12 months have been the hottest since recorded-keeping started in 1895, according to the National Oceanic and Atmospheric Administration (NOAA).
Average temperatures in the continental US for the month of June were a full 2 degrees above the average for the 20th century. It was even worse in Colorado, where temperatures for June were 6.4°F above average. In the latter half of June, 170 record temperatures were broken or tied, hitting 113 in South Carolina and 112 in Georgia, for just two examples.
Sure it's summer, and summer is supposed to be hot. But not this hot—not without global warming at least. NOAA's National Climatic Data Center says that the odds of this heat wave occurring randomly would be 1 in 1,594,323. Pretty low odds. Even critics of that figure say the chances of this summer happening without global warming would be extremely low at 1 in 100,000.