Why some scientists think extreme heat could be the cause of people’s disappearance in Greece

It was a shock when Michael Mosley, a doctor and well-known TV presenter in Britain, was found dead earlier this month after walking in scorching temperatures on the Greek island of Symi.

But it is now one of a series of deaths and disappearances among tourists in Greece as the country experiences a powerful heatwave in early summer, with temperatures soaring above 40 degrees Celsius (104 degrees Fahrenheit).

A Dutch tourist was found dead on the island of Samos on Saturday. The next day, the body of an American tourist was found on Mathraki, a small island west of Corfu. ...