The specific hottest temperature reading from Death Valley in 1913 is far from certain. The reality is we aren't sure how accurate that reading really was (turns out, measuring accurately temperature is harder than one might think). We're a lot more certain about recent temperature readings and aside from Death Valley there are far more records broken nowadays than in the past. For example just 2 years ago, Canada's hottest temperature reading was (121.3f) in Lytton BC. Before that, the record was set thousands of miles away. Lytton usually gets hot in the summer, but never that hot.