Heavy downpours that struck Istanbul on October 14 caused widespread flooding and disrupted transport services. According to local meteorologists, more than 200 mm of rain per square meter fell on the city over the course of 24 hours—a record-breaking amount.

According to the governor’s office, 1277 instances of residential flooding and 15 landslides were recorded on Wednesday. In many areas, roads turned into rivers; underpasses were flooded in some locations, and traffic congestion during rush hour reached 89%. Over the course of the day, municipal services received 2,518 reports concerning flooding, landslides, people trapped, and damaged roofs. Water flooded the Esenler, Zincirlikuyu, and Topkapı metro stations. In the Arnavutköy district, the Alibey River burst its banks, while a section of a road collapsed in the Eyüpsultan district. More than 8,000 emergency responders and approximately 2 thousand pieces of equipment have been deployed to address the aftermath.

The adverse weather also affected air travel. More than 40 aircraft bound for Istanbul were diverted to other airports: 16 flights were sent to Ankara, 10 to Izmir, and 8 to Sabiha Gökçen Airport, located on the city's Asian side. Meanwhile, the governor's office stated that the runways remained open and that no flights had been canceled.

On October 15, authorities suspended in-person classes at all public and private educational institutions in Istanbul. Residents have been advised to stay home whenever possible and to avoid areas prone to flooding and landslides. Restrictions have also been imposed on the use of motorcycles and other two-wheeled vehicles.

A yellow weather alert has been issued for the city for October 15. Authorities warn of the potential for further flooding, mudslides, and disruptions to transport and infrastructure. According to forecasts from municipal meteorologists, the rain is expected to continue until Sunday.