If you are James Hansen, you get to just make numbers up and have the press believe you.
The research by a man often called the “godfather of global warming” says that, from the 1950s through the 1980s, the likelihood of such sweltering temperatures occurring was rarer than 1 in 300. Now, the odds are closer to 1 in 10, according to the study by James Hansen. The NASA scientist says that statistically, what’s happening is not random or normal, but pure and simple climate change.
Hansen is either an idiot, a liar, or both. The odds of hot weather in the US have decreased considerably.