Greece has ordered evacuations for areas near two central cities after new fires broke out during a punishing heatwave.
Crews had already scrambled to douse deadly blazes that have also struck countries around the Mediterranean, killing dozens.
Thousands of people were moved from areas of Greece this week as fires also flared in Croatia and Italy, and killed 34 in Algeria, in extreme heat that has left landscapes tinder dry.
The new blazes threatening central Greece prompted orders for locals to leave areas near the cities of Volos and Lamia.
"Today is the most difficult day of the summer," fire department spokesman Ioannis Artopios told reporters in Athens, noting that crews were battling 90 fires - of which 61 had broken out in the last 24 hours.
One woman was found dead in a camper van in a coastal area near Volos, the fire department said.
The body of a cattle farmer was discovered in one of the evacuated areas near Volos.
They bring to five the number of deaths in Greece's wildfires, including two water bomber pilots whose plane crashed on Tuesday, and a cattle farmer on the island of Evia.
"Back home, there is nothing left and not even a sheep survived," Taous Timizar, a survivor of the blaze in northeast Algeria, said.
Witnesses described fleeing walls of flames that raged "like a blowtorch", and TV footage showed charred cars, burnt-out shops and smouldering scrubland.
Scientists from the World Weather Attribution group said the heatwaves that have hit parts of Europe and North America this month would have been almost impossible without human-caused climate change.
The European Union's climate observatory Copernicus said smoke emissions from wildfires in Greece have been the highest for this period of time in the last 21 years.
Greece has battled over 600 fires in the past 12 days, the government said.
Temperatures were expected to hit between 43-46 degrees Celsius in central and southern Greece, according to the national meteorological service.
Storms are forecast for tomorrow.
Greece is used to summer heatwaves, but is experiencing one of the longest ones in recent years, according to experts.
The civil protection ministry has warned of an extreme danger of fire in six of the country's 13 regions.
Wildfires, which have been burning in several parts of the country for more than ten days, were ravaging the tourist islands of Rhodes, Corfu and Evia.
The EU crisis management commissioner's office said over 490 firefighters and seven planes had been deployed to different areas in Greece under the bloc's civil protection mechanism.
At least 100 firefighters were working to contain the flames on Evia.
Read more:
Will blazes and melting heat end sun-breaks to the Med?
Three dead as Sicily counts losses from 'devastating' fires
Hundreds of firefighters scramble to put out Portugal wildfire
Wildfires spread near Croatian city of Dubrovnik
Fires around the Mediterranean
Authorities have evacuated tens of thousands of people from fire areas in Greece, including many tourists.
The severe heatwave in Greece has also been reflected across much of southern Europe and northern Africa.
In Italy, firefighters spent the night battling wildfires in Sicily, one of which approached so close to Palermo airport that it shut down for several hours yesterday morning.
Italy's civil protection department reported "extensive fires" across the south.
In the north, a 16-year-old girl on a camping trip was among two people killed by falling trees during violent storms.
Dozens of firefighters were battling a wildfire near Croatia's picturesque southern city of Dubrovnik, authorities said, with water-bombing planes dispatched to help contain the blaze.
Around 130 firefighters were working to contain the flames that had been spread by strong winds yesterday.
Local media reported the fire also triggered landmines to explode in the area.
During the bloody break-up of Yugoslavia in the 1990s, Dubrovnik was besieged and shelled by Serb forces, leading several areas in the city to be damaged while swathes of its outskirts are still contaminated by landmines.
