Living in mega cities provides citizens with special opportunities and advantages, but also opens the way for some dangers. Cities that grow and continue to develop with ecological and economic pressures are constantly changing. Managing mega cities becomes even more difficult. With rapid global urbanization, cities not only make use of the most of the world's population, but also represent the concentration of economies, social and entrepreneurial capital. Smart cities should also provide resistance to natural disasters (for example adverse weather conditions, floods, etc.). Istanbul is located along the large North Anatolian seismic fault line. The city's exposure to natural disasters makes risk management a critical issue for the city of Istanbul.