At least in the lower 48 states.
RONALD BAILEY | 7.19.2019, Reason
Americans east of the Rockies are sweltering as daytime temperatures soar toward 100 degrees or more. It is now customary for journalists covering big weather events to speculate on how man-made climate change may be affecting them, and the current heat wave is no exception. Take this headline in The New York Times: “Heat Waves in the Age of Climate Change: Longer, More Frequent and More Dangerous.”
As evidence, the Times cites the U.S. Global Change Research Program, reporting that “since the 1960s the average number of heat waves—defined as two or more consecutive days where daily lows exceeded historical July and August temperatures—in 50 major American cities has tripled.” That is indeed what the numbers show. But it seems odd to highlight the trend in daily low temperatures rather than daily high temperatures.
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