A statement posted on the website of the office of the presidency said that de Sousa "spoke at length on the telephone" with Pavlopoulos, "expressing the most heartfelt condolences to the families of the victims, as well as a wish for the rapid improvement to all the injured.

"He also transmitted his profound fraternal solidarity with the Greek people, remembering the tragedy of the same kind that we live in Portugal last year," the statement reads.

Meanwhile, Portugal's prime minister, António Costa, said in a post on social media that he had already "transmitted to the prime minister [of Greece, Alexis] Tsipras Portuguese readiness and solidarity and condolences to the Greek people and the mourning families."

Officials reached out to their counterparts in Greece, in the words of the note from the presidency's office, "in the light of the horribly tragic consequences arising from the strong fires that have been devastating Greece, with dozens of mortal victims and more than a hundred wounded."

The fires have so far claimed at least dozens of lives and left hundreds of people injured, some of them in critical condition, according to the latest data from the civil defence authority there.

Some countries have already responded to a request by Greece’s government on Monday night for help in fighting the fires.

Portugal is to send 50 members of its Special Fire Force (FEB) to help fight the fires in Greece, the minister of internal administration has said.

De Sousa undertook a state visit to Greece in March this year, at the invitation of his counterpart there.

He has also sent messages of solidarity to the King of Sweden and the King of Norway after the fires in those countries, his office said in another note published on Tuesday that noted that Portugal had provided aircraft to help fight the fires in Sweden as part of its participation in the European Union’s civil protection mechanism.