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 are currently raging in Turkey, Greece and Bulgaria amid a 44°C heatwave, ongoing droughts and strong winds. A map from Nasa shows how flames have spread across the region in the last week despite efforts to contain them. What has become clear is that climate change is accelerating the disaster in a region already on the brink.