Hot and alone: how US cities work to protect isolated people in heatwaves

Data shows people living alone were more likely to die in recent periods of unusually intense heat around the world

The dangers of extreme heat can be amplified by social isolation, experts have warned, with those living alone found to be most likely to suffer.

Heatwaves are deadly," Eric Klinenberg, a sociologist at New York University who studies climate disasters, once said. Cold societies make them far more lethal."