Wildfire in northeastern Greece is the biggest the EU has ever recorded

After burning across vast tracts of land, the blaze in the Alexandroupolis and Evros regions was mainly concentrated deep in a forest near the border with Turkey on Tuesday.

It's an area difficult to access for firefighters and other emergency workers. 

The blaze was blamed for 20 of 21 wildfire-related deaths in Greece last week, 18 of them migrants. 

Six planes and four helicopters were assisting 475 firefighters on the ground, backed by 100 vehicles, the fire department said. Another 260 firefighters and one helicopter were tackling flare-ups of another major fire burning for days in a forest on the southern slopes of Mount Parnitha, on the fringes of the Greek capital.

• How damaging were Greek wildfires? Experts explain how heatwave fanned the flames
• ‘Bleak reality’: Greece wildfires kill 20 with dozens of firefighters injured
• Cemetery burned as Greek wildfires sweep through villages

The extent and destruction of the blaze prompted a coordinated response from the European Union. 

"The Commission at this moment is coordinating relief efforts on various fronts by the EU civil protection mechanism across Europe," said EU Spokesperson Balazs Ujvari. "So, most notably in Greece's Alexandroupolis region, we are facing the largest wildfire ever recorded in the EU. In this context, we have mobilised 12 aircraft from our RescEU fleet together with over 400 firefighters and 60 vehicles."

Authorities are investigating the causes of the fires, which over the past week have destroyed large tracts of forest, scorched homes and triggered the evacuation of thousands of people.

In Athens, Prime Minister Kyriakos Mitsotakis chaired a government meeting on how to rehabilitate the burnt forests in Evros and Parnitha. It decided to identify all burned areas for reforestation, take action to prevent flooding later in the year and provide access to food and water for the area's surviving wildlife.

With firefighting forces stretched to the limit, Greece has called for help from other European countries, receiving 12 aircraft and hundreds of firefighters from across the continent.

France and Spain were sending additional aircraft to join those already sent from Germany, Sweden, Croatia, Cyprus and the Czech Republic under the EU’s emergency response mechanism.

More than 350 firefighters have also been sent to Greece from Romania, France, the Czech Republic, Bulgaria, Albania, Slovakia and Serbia.

The top EU official for crisis management, Janez Lenarcic, said Tuesday it was the bloc's largest aerial firefighting operation and “underscores our commitment to swift and effective collective action in times of crisis.”

The Alexandroupolis and Evros wildfire, which broke out on the 19th of August has scorched more than 81,000 hectares (200,000 acres) of land, according to the European Union’s Copernicus Emergency Management Service. Copernicus is the EU space program’s Earth observation component and uses satellite imagery to provide mapping data.

The European Commission described it Tuesday as the largest single blaze recorded in the bloc since the European Forest Fire Information System began recording data in 2000.

Across Greece, firefighters were battling 74 wildfires on Monday, with 27 of them having broken out in the 24 hours between Sunday evening and Monday evening, the fire department said.

Arson has been suspected in some of the blazes, with several people arrested.

Greece imposes wildfire prevention regulations, typically from the start of May to the end of October, limiting activities such as the burning of dried vegetation and the use of outdoor barbecues.

As of Friday, fire department officials had arrested 163 people on fire-related charges since the start of the fire prevention season, including 118 for negligence and 24 for deliberate arson, government spokesperson Pavlos Marinakis said. Police made an additional 18 arrests, he said.