Albert Calibet, American Tourist With Possible SoCal Ties, Disappears in Greece Amid Scorching Heatwave

An American tourist with possible ties to Southern California has disappeared in Greece amid a sweltering heatwave in the Mediterranean country.

Albert Calibet, 59, disappeared on Tuesday on the island of Amorgos while following a road towards the village of Katapola, the municipality of Amorgos said on its official social networks.

Search and rescue operations are underway.

Popi Despotidi, Amorgos' deputy mayor for tourism, told CNN on Thursday that Calibet has been coming “to Amorgos almost every year” for about a decade.

And on the island of Samos, a 74-year-old Dutch tourist has been missing since Sunday, while a large search and rescue operation is underway, authorities said. The man had gone hiking in the Marathokampou region of the island, the Samos Hellenic Rescue Team said in a Facebook post on Wednesday. Local residents are participating in the search, the statement added.

Konstantia Dimoglidou, a spokeswoman for the Greek police, told CNN on Thursday that “police, firefighters and volunteers are involved in the search, including by air,” to find the two men. “Unfortunately, we have no news from any of them yet,” she added.

News of the disappearances comes just days after the body of British television personality Michael Mosley was discovered after he disappeared while walking in scorching weather on the Greek island of Symi.

Mosley, a television doctor who popularized a type of intermittent fasting known as the 5:2 diet, was reported missing by his wife after he failed to return from an island walk. It took several days to find his body.

Greece is currently experiencing a scorching heatwave that is expected to peak on Thursday, according to the Hellenic National Weather Service, which has issued an orange warning for heat – the second most severe designation.

Authorities closed Athens' Acropolis on Thursday afternoon for a second day as the country sweltered under unseasonably high temperatures.

All other archaeological sites in the Greek capital were also closed at the same times. People who have booked tours for this period will be able to use their tickets later in the day until the sites close at 8 p.m., the ministry said.

Temperatures topped 104 degrees Fahrenheit on Thursday across much of central and southern Greece, including greater Athens, the Cyclades and Crete.

The Associated Press and CNN Wire contributed to this report.