An official in Turkey says the country faces a “very risky week” for wildfires as blazes across parts of southeast Europe and the Balkans damaged homes and led to a huge firefighting operation that included evacuations.

Wildfires that have engulfed Turkey for weeks spread rapidly overnight, threatening Bursa and forcing 3,500 to flee. Greece and Bulgaria are also contending with fires.

Firefighters battled on Monday to put out wildfires in three separate provinces of Turkey, in Greece and near a tourist resort in Albania, stoked by strong winds after days of searing heat across the Mediterranean region.