Flights to Greek islands are continuing despite being ravaged by wildfires.
There have been chaotic scenes on Rhodes and Corfu over the last few days, with locals and holiday-makers rushed to safety amid a major heatwave.
Greek Prime Minister Kyriakos Mitsotakis has told the country's parliament they must remain on constant alert over the coming days and weeks, with temperatures on the mainland exceeding 45°.
Holiday company TUI has cancelled bookings to Rhodes.
Damian Mac Con Uladh, an Irish journalist based in Greece, told Newstalk Breakfast the fires are now in their eighth day.
"Today we're about to enter the third heat surge of the present heatwave," he said.
"The fires [on Rhodes] they're entering now their eighth day, so it will make the firefighting situation difficult.
"We have winds on Rhodes that can lead to flare-ups, where fires that had been extinguished reignite.
"Rhodes is classified red on the Civil Defence's fire prediction map for the country.
"The likelihood of fire is extremely high".
Similar warnings are in place for parts of Crete, but Mr Mac Con Uladh said there have been no major fires there as yet.
"They haven't had any fires yet, but it just means that the local authorities there will be on high alert for the outbreak of any fire," he said.
"The fire prediction map looks at the dryness of the ground and the temperatures to work out where should the forces be concentrated.
"The difficulty in a lot of these areas is extinguishing them - the fires take place in natural woodland.
"It's very hard to access them, the terrain is very difficult".
"You've the water-bombing aircraft doing their best to quench them, and then you've ground crews," he said.
"But the ground crews are working in very, very difficult conditions.
"The priority really is protecting people and protecting property, people's homes.
"It's very difficult to put out a fire front that could be 5km, 6km, 7km long".
Mr Mac Con Uladh decisions to cancel flights and holidays "is being left up to the companies."
"Anybody who has a flight booked to Greece, they should certainly check with their operator, check with the airline," he added.
Anyone in need of consular assistance can call the Irish embassy in Greece on +30-2107-232-771 or the Honorary Consulate of Ireland in Rhodes on +30-2241-075655