On Tuesday, a major blaze broke out near an industrial area outside of Athens, causing train delays and prompting authorities to close a section of the national highway.

During Greece’s worst heatwave in over 30 years, more than 100 firefighters with 35 trucks and nine planes battled the flames in the Varympompi area near Parnitha mountain amid blistering temperatures.

Fire brigade spokesman Vasilis Vathrakogiannis said the blaze was not threatening factories in the area but an evacuation of the zone would be ordered if necessary.

The Civil Protection authority warned residents to be on alert and keep windows and doors shut to prevent sparks from entering their homes.

More than 100 wildfires have burned in Greece in the last couple of days, fanned by winds and high temperatures.