The increasing frequency of fatal wet-bulb temperatures
When a deadly heatwave hits India’s northern plains, some 20m people are killed by persistent “wet-bulb” temperatures of more than 35°C (95°F). That is the plot of “The Ministry For the Future”, Kim Stanley Robinson’s novel about climate change. The scenario is fiction but similar temperatures have been briefly recorded in the real world. And as the globe warms they will become more common.