Wildfires that have engulfed Turkey for weeks threatened the country’s fourth-largest city early Sunday, causing more than 1,700 people to flee their homes and leaving a firefighter dead.

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.

Wildfires driven by searing temperatures and strong winds ravaged Turkey and parts of Greece in recent days, leaving four people dead and forcing hundreds of residents and tourists to flee the flames.