Greece expected scorching heat on Wednesday as crews scrambled to douse deadly wildfires that also struck nations around the Mediterranean.

Thousands of people evacuated Greece, as Greek authorities struggle against flames on three major fronts, including the tourist islands of Rhodes and Corfu.

The civil protection ministry warned of the extreme danger of fire in six of the country's 13 regions on Wednesday.

Wildfires, which have been burning in several parts of the country for more than 10 days, were ravaging the tourist islands of Rhodes, Corfu and Evia.

At least 100 firefighters were working to contain the flames on Evia, where on Tuesday two pilots were killed when their water bomber aircraft crashed.

Meanwhile, The body of a third victim was also found on Evia, as Fires also flared in Croatia and Italy, as flames killed dozens of people in Algeria earlier in the week, with scorching heat leaving landscapes tinder dry.

Scientists from the World Weather Attribution group said this week the heatwaves that hit parts of Europe and North America this month would have been almost impossible without human-caused climate change.

Temperatures are expected to hit between 43-45 degrees Celsius (109-113 degrees Fahrenheit) in central and southern Greece, according to the national meteorological service.

According to experts, Greece is used to summer heatwaves but is experiencing one of the longest ones in recent years.