Modern heatwaves feel a lot hotter than any measurements indicate, scientists warn

Findings have implications for those who may suffer through heat waves

The heat index measurement, calculated by meteorologists to indicate how hot it feels, underestimates the temperature perceived by people on the most sweltering days, a new study reveals.

Climate scientists, including those from the University of California (UC) Berkeley in the US, say the apparent temperature perceived by individuals is sometimes off by over 20°F.

Humans adapt to hot temperatures by sweating as well as flushing, a natural process where blood is diverted to capillaries close to the skin to dissipate heat.