Heatwaves loom as a growing threat to humanity in a warming climate. This summer alone, in the northern hemisphere, thousands have died during extreme heat events. It's driving researchers to find out more about the point when heat turns deadly.
This is not a case of scientists learning something stupidly obvious. It IS a stupid article that buries the relevant info. But the take-away is that the study revises the deadliness of temperatures downwards—we can expect people to die at lower temps than the wet-bulb benchmark.