Istanbul, Turkey's largest city and home to around 16 million people, faces the high probability of a major earthquake in the next 20 years, warns Professor Celal Sengor, one of Turkey’s foremost geoscientists. The city sits close to two key fault lines, the North Anatolian and the East Anatolian, and is one of the most seismically active regions in the world. A magnitude 7.5 earthquake along the North Anatolian fault could lead to the destruction of around 90,000 buildings in the city, with a further 260,000 facing significant damage, making around 4.5 million people homeless, according to city officials. The mayor of Istanbul has launched the city’s “roadmap for disaster preparedness,” which includes greater funds allocation for the city’s disaster preparedness program, new emergency points for citizens, and a rapid scanning system to assess the safety of the city’s buildings.