Istanbul — Turkey faced a “very risky week” for wildfires, an official said Monday, as blazes across parts of southeast Europe and the Balkans damaged homes and led to a huge firefighting operation that included evacuations. Nearly 100 people face prosecution over the fires in Turkey.

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.

Turkey faces a “very risky week” for wildfires, an official said, as blazes across parts of south-east Europe and the Balkans damaged homes and led to a huge firefighting operation that included evacuations.