KOCAELİ Authorities have evacuated 21 buildings in the northwestern province of Kocaeli’s Gebze district following the collapse of a seven-story apartment building on Oct. 29 that killed four members of a family and left only one survivor. The decision came after preliminary inspections revealed possible ground instability near the collapse site. Kocaeli Governor İlhami Aktaş said teams are focusing on potential soil-related problems, noting that “high-precision devices are being used to