(Updated June 20, 2023)

Temperatures in Delhi reached 46 °C this week. How does this kind of heat affect people?

In my last post “Why do most hot countries remain poor?” I summarised explanations by influential economists and geographers. I reviewed the quantitative evidence that demonstrates the strong inverse link between climate temperature and economic productivity.

Of course, a correlation does not necessarily imply a cause.

23 years on, we now have research on physiology that has helped us understand a little more on how people are affected by hot climates. While there are still large gaps in our understanding, there is now little doubt that cooling is essential for economic and social development, even more so as climate warming raises temperatures everywhere.