Greek Prime Minister Kyriakos Mitsotakis said that Greece is "at war" and that Athens would remain on "alert." Temperatures have soared above 40 degrees Celsius in many parts of the country.
Panos Varouchas, Corfu's deputy mayor for tourism, said in comments to DW that most of those evacuated on the island had returned to their residences.
"Everything is under control and 95% of the people are back to their residences, are back to their hotels," he said.
"We haven't had this occasion for at least the last 35 years, so it was a crash test," he said. "The good thing is we had [put out] the notice a few hours before, so everything went (according to) plan."
Varouchas said that no injuries were reported.
The official said that Greece had developed civil protection units during the COVID-19 pandemic that will help the country to manage the consequences of global warming.