15.10.2026 11:23
After record rainfall in Istanbul reaching up to 242 kilograms per square meter, dam occupancy rates increased by 7.16 points in a single day, rising from 38.06 percent to 45.22 percent.
As Istanbul's heaviest rainfall in recent years came to an end, the impact of the storm and downpour that affected the citywide area on the dams was announced. In a statement by the Istanbul Metropolitan Municipality (IBB), it was reported that in some parts of the city, the amount of rainfall per square meter exceeded 240 kilograms, and these values were among the highest records recorded since 1985.
BEYKOZ AND SARIYER RANKED FIRST
According to the announced data, the district in Istanbul that received the most rainfall per square meter was Beykoz with 242 kilograms. In Eyüpsultan, 190.5 kilograms of rainfall per square meter was measured, while in Sarıyer it was 187.9 kilograms. While the amounts of rainfall per square meter around the Bosphorus and in the northern and central parts of the European Side varied between 100 and 230 kilograms, across the city the 100-kilogram threshold was exceeded.
RECORD INCREASE IN DAM OCCUPANCY RATE
After the heavy rainfall, there was a noticeable increase in the occupancy rates of Istanbul's drinking water sources. The overall dam occupancy rate, recorded as 38.06 percent yesterday, rose to 45.22 percent after just one day, with a jump of 7.16 points.