Roads turned into lakes in Tuzla and Pendik, traffic congestion reached 80 percent at 08:20

Streets and roads in Tuzla and Pendik turned into lakes in the early morning hours, with some vehicles becoming trapped in water accumulations. As of 08:20, traffic congestion was measured at 80 percent on the IBB traffic density map. Water accumulations also formed on some streets and roads on the TEM Highway in Bayrampaşa and in Ümraniye.

In a warning issued by Istanbul Governorate, it announced that based on data from the General Directorate of Meteorology, heavy downpours (21-50 kg/m²) were expected from the morning hours onwards, and very heavy downpours (21-75 kg/m²) were forecast for Arnavutköy, Sarıyer, Beykoz, Eyüp, and Şile. The IBB Disaster Coordination Center (AKOM) drew attention to wind speed, announcing that temperatures were expected to drop 5 to 7 degrees and that rainfall was expected to continue intermittently throughout the day across the province. AKOM also noted that between 06:00-12:00 hours, sporadic heavy downpour effects were forecast in the districts of Eyüpsultan, Sarıyer, Beykoz, and Şile in the northern part of the city.

While the General Directorate of Meteorology expected rainfall to continue showing its effects throughout the day, it issued an orange alert for Muğla and yellow alerts for Antalya, Balıkesir, Bursa, Çanakkale, Denizli, Istanbul, Izmir, Kocaeli, Tekirdağ, and Yalova. Caution was requested against sudden floods, flash flooding, lightning, strong winds, and transportation disruptions. According to MGM's latest weekly report, nearly a week of downpour rainfall is expected across the country.