Most of these tourists had undertaken hikes under the blazing sun, while the heatwave was raging in Greece.
The body of the American, who was discovered at sea near the port of Mathraki by a tourist, is to be transferred to Corfu hospital for an autopsy, the Greek agency said Athens News Agency and public television ERT.
According to Athens News Agency, the fifty-year-old was on vacation in Mathraki. He was last seen by locals at a cafe last Tuesday.
This is the latest discovery of the body of a foreign tourist, after that of British television star doctor Michael Mosley, found dead on June 9 on the Greek island of Symi in the Aegean Sea, then that on Saturday of a Dutch tourist on Samos island.
Two French women are also missing on the island of Sikinos and another tourist on the island of Amorgos.
The body of the 74-year-old Dutch tourist was spotted on Saturday morning on the island of Samos by a fire brigade drone, lying in a ravine a few hundred meters from where he was last seen last Sunday, walking with difficulty.
On Friday, two French women were reported missing from Sikinos, a small Cycladic island in the Aegean Sea. The two women, aged 73 and 64, had left their respective hotels to meet, according to local media.
On June 9, British journalist and doctor Michael Mosley, known for his appearances on key British television shows, was found dead on the island of Symi, several days after his disappearance on June 4.
His lifeless body was spotted by a team from the Greek public channel ERT who was filming the area where this 67-year-old man had disappeared. Michael Mosley had taken a walk on the coast, in the heat of the day.
According to meteorologists, Greece experienced the heatwave lasting at least three days – which for Greece means temperatures exceeding 38 degrees – the earliest on record.
