A heatwave across southern Europe forced authorities in Greece to close the Acropolis for several hours on Wednesday and two firefighters died while putting out a fire in the Basilicata region in southern Italy, Italian authorities said.

Italy added Palermo, Sicily, to the list of 13 cities in the country with a severe heat warning. Elderly people in the city of Verona were urged to stay indoors, while sprinklers were set up to cool passers-by.

Greece’s Culture Ministry ordered the closure of the Acropolis — the country’s biggest cultural attraction — from midday for five hours.

Tourists hoping to visit the Parthenon temple atop the Acropolis queued early in the morning to beat the worst of the heat, while the Red Cross handed chilled bottled water and information fliers to those waiting in line.

“We got it done and got out quick,” said Toby Dunlap, who was visiting from Pennsylvania and had just toured the Acropolis. “But it’s hot up there, it really is. If you don’t come prepared, you’re going to sweat.”

Meteorologists said the hot air from Africa was forecast to continue through until Sunday, with heatwave temperatures expected to peak at 43C (109F).

In Albania, the heat led the government to reschedule working hours for civil servants, making it easier for some to work from home.

Neighbouring North Macedonia struggled with dozens of wildfires that had broken out in the previous 24 hours.

One major blaze stretched across nearly 30km (21 miles). Firefighting aircraft from Serbia, Montenegro, Croatia, Romania and Turkey responded to the country’s call for assistance.

In western Turkey, firefighters — aided by more than a dozen water-dropping aircraft — managed to bring a wildfire near the town of Bergama under control several hours after it ignited.

The cause of the blaze, which was fanned by strong winds, was not immediately known.

The municipality of Turkey’s largest city Istanbul issued a heat warning on Tuesday, saying temperatures would rise between 3-6C (37-43F) above seasonal norms until July 28.

Several Spanish cities, including Granada and Toledo, are bracing for temperatures as high as 44C (111F) forecast for later in the week in the country’s hottest spots in the south.