The Copernicus Emergency Management Service announced the damage estimate Wednesday, a day after the wildfire was contained in a massive effort that ended on the capital's outskirts.

A factory worker was killed in the fire that swept through mountainous areas southward, covering an area almost twice the size of Manhattan and blanketing the Greek capital with a thick cloud of smoke.

Nine countries, including neighbouring Turkey, assisted Greece in boosting ground crews and water-dropping planes and helicopters outside Athens.

The wildfire follows successive heat waves across southern Europe and low levels of rainfall this year.

According to an updated estimate by the National Observatory of Athens, over the past eight years, 450 sq. kilometres (174 sq. miles) of forest have been burned in the Attica region that includes Athens. That amounts to 37% of the region’s total forested area.