Courtesy Death Valley National ParkToday is the 100th anniversary of the hottest temperature ever recorded on Earth. On July 10, 1913, the U.S. Department of Agriculture weather observer's thermometer at Greenland Ranch in Death Valley, California topped out at a scorching 134 °F! That's pretty dang hot! The highest temp I ever experienced was 115 °F in Las Vegas back in 1978. That was really hot (despite the low humidity), and I can't imagine what 19 degrees hotter would feel like.