More than 600 firefighters, including reinforcements from several European countries, backed by a fleet of water-dropping planes and helicopters were battling three persistent major wildfires in Greece on Sunday, two of which have been raging for days. A massive blaze in the country’s northeastern regions of Evros and Alexandroupolis, believed to have caused the deaths of 20 people, was burning for a ninth day.

The blaze, one of the largest single wildfires ever to have struck a European Union country, has decimated vast tracts of forest and burnt homes in the outlying areas of the city of Alexandroupolis. On Sunday, 295 firefighters, seven planes and five helicopters were tackling it, the fire department said. The wildfire has scorched 770 sq km of land and had 120 active hotspots, the European Union’s Copernicus Emergency Management Service said on Sunday.