
Yellow code warning was given in Istanbul and 20 provinces, and orange code warning was given in Hatay and Osmaniye.
AI-generated summary
A cold wave originating from Siberia is entering the Marmara Region. The temperature in Istanbul will drop from 18-20 degrees to 12 degrees. Heavy rain and wind are expected.
Türkiye is under the influence of the cold wave coming from Russia. Air temperatures will drop by 8 degrees in many provinces, including Istanbul.
According to the statement made by Istanbul Metropolitan Municipality (IMM) Disaster Coordination Center (AKOM), a cold wave of Siberian origin is expected to enter the Marmara Region as of today.
For this reason, it is predicted that there will be intermittent showers throughout the week, and the temperatures, which are currently at spring values around 18 to 20 degrees, will decrease to 12 degrees as of today, falling below seasonal norms.
It is predicted that the precipitation, which eased at night, will increase its effect again in the morning hours, intermittent heavy showers will continue to occur throughout the day, and a total of 30-60 kilograms of precipitation per square meter will fall.
On the other hand, Istanbul Governorship warned for heavy rain that will be effective starting from the morning today.
According to the governorship's statement, intermittent and locally heavy showers and occasional thunderstorms are expected from the morning hours.
According to the statement, the wind is expected to blow from the north after noon, strong (40-60 km/h) and occasionally as a short-term storm (50-70 km/h). Citizens were asked to be careful and cautious against negativities such as floods, inundations, transportation disruptions, landslides and lightning due to heavy rain.
Today, an orange coded storm and heavy rain warning was issued for Hatay and Osmaniye.
A yellow code warning was issued for 21 provinces, including Istanbul. The warning is valid for all districts of Istanbul.
The provinces with a yellow code warning are as follows:
Adana, Aydın, Balıkesir, Bursa, Çanakkale, Edirne, Gaziantep, Istanbul, İzmir, Kastamonu, Kırklareli, Kocaeli, Manisa, Muğla, Sakarya, Sinop, Tekirdağ, Zonguldak, Bartın, Yalova and Düzce

Thunderstorms hit Istanbul in the evening. Streets were filled with water in Üsküdar, Pendik, Sultanbeyli, Çekmeköy, Beykoz, Küçükçekmece, Maltepe, Sultangazi, Fatih, Bahçelievler, Beylikdüzü, Bağcılar and Eyüpsultan. Traffic density was measured at 89 percent. Istanbul Governorship issued a warning for intermittent and sometimes heavy showers as of Wednesday morning, 04.11.2026.

Heavy rain was effective in Istanbul in the evening hours. In some districts, streets were filled with water and vehicles had difficulty moving. According to IMM CepTrafik data, traffic density throughout the city was measured as 89 percent. Istanbul Governorship warned that intermittent and sometimes heavy rain is expected as of Wednesday morning, 04.11.2026.
The heavy downpour that hit Istanbul in the evening hours caused waterlogging and traffic congestion in many districts. Traffic density throughout the city reached 89 percent.

Heavy rain in Istanbul increased the traffic density to 90 percent. While the Ministry has warned of floods, landslides and tornadoes for 23 provinces, temperatures are expected to drop towards the weekend and snowfall in higher areas.
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Heavy downpour in Tekirdağ's Süleymanpaşa district caused roads to be flooded and daily life to be disrupted in Cumhuriyet and Değirmenaltı neighborhoods.