Istanbul Dam Levels Reach 10-Year High After Heavy Rain

Heavy, persistent rain in Istanbul disrupted daily life while raising water levels in the city's dams. According to İSKİ data, the occupancy rate, measured at 38 percent five days earlier, rose rapidly after the rains to 53.54 percent. The figure is the highest of the October measurements recorded over the past 10 years.

At the Alibeyköy Dam, occupancy climbed from around 34 percent to 76.6 percent as of today, and dried areas around the lake filled with water again. October readings there were also reported as the highest in 10 years. Last October the rate was 13.29 percent, while in 2024 it was 6.62 percent for the same dates.

The Darlık Dam Lake basin became the fullest in Istanbul, at 88.53 percent. In the north, the Kazandere and Papuçdere dams remained well below desired levels, with the Kazandere Dam Lake at 8.08 percent occupancy.