Climate Change and the Lancet’s ‘Heat Death’ Deception

With COP27 approaching, the journal claims rising temperatures have killed people but ignores that they appear to have saved far more

By Bjorn Lomborg. Excerpts:

"Annual heat deaths have increased significantly among people 65 and older world-wide. The average deaths per year increased 68% from the early 2000s to the late 2010s. But that is almost entirely because there are so many more older people today than there were 20 years ago, in no small part thanks to medical innovations that keep us alive longer. Measured across the same time span the Lancet maps heat deaths, the number of people 65 and older has risen by 60%, or almost as much as heat deaths. When the increase in heat mortality is adjusted for this population growth, the actual rise that can be attributed to rising temperatures is only 5%.

It is hard not to see the Lancet study’s failure to adjust this figure as a deliberate act of deception. Any academic who works with statistics would know to adjust the deaths to account for population growth. I’ve actually raised this issue to the Lancet before. Last September the journal published a study with the same fallacious argument, and I sent the editor a detailed letter explaining the problem. The Lancet never corrected it and here it is, over a year later, committing the same error.

This year’s study also cherry-picks data by discussing only heat deaths. Around the world, far more people die each year from cold than heat. In the U.S. and Canada between 2000 and 2019, an average of 20,000 people died from heat annually and more than 170,000 from cold. This omission matters even more because cold deaths are decreasing with rising temperatures. Modeling from the Global Burden of Disease replicates the relatively small increase in heat deaths shown by the Lancet, but shows a much larger decline in cold deaths from rising temperatures. Based on today’s population size, the current temperatures cause about 17,000 more heat deaths in older people, but also result in more than half a million fewer cold deaths. Reporting one finding without the other is misleading about the true effect of climate change."