Drowning risk increases during heatwaves in unexpected ways -- here's how to stay safe this summer.

Drowning risk increased during low-intensity heatwaves and was higher still during severe heatwaves, but dropped back a little during extreme heatwaves, though the risk remained higher than usual. While risk rises from 17% during low-intensity heatwaves to 26% during severe heatwaves, risk of drowning reduced to just 9% during extreme heatwaves (the highest intensity). This means we compared the 248 non-heatwave drowning deaths and 603,892 non-heatwave days, with the 92 heatwave drowning deaths occurring on 191,420 heatwave days. [Extracted from the article]