Dense fog blanketed many cities in Turkey, with Istanbul getting hit the worst. The Osmangazi bridge seen from above the fog in Izmit, Nov. 6, 2021.

A person paddling in a river in Turkey's northwestern province of Edirne, Nov. 7, 2021.

A flower seller walking along the Üsküdar seafront with the Maiden Tower in the background, Istanbul, Turkey, Nov. 7, 2021.

Mount Çam in Sakarya meets the day with thick fog covering its valley, Nov. 7, 2021.

A mother and child walk along the Kalamış seafront in Istanbul, Nov. 7, 2021.

A cat sitting on the Kalamış seafront during heavy fog, Istanbul, Nov. 7, 2021.

A road snakes through Mount Çam with the fog slowly receding, Nov. 7, 2021.

A restaurant on Istanbul's Galata Bridge in Eminönü, Nov. 7, 2021.

People take a stroll in Adapazarı, Sakarya, Nov. 6, 2021.

A boat sails through the Bosporus strait during a foggy day in Istanbul, Turkey, Nov. 6, 2021.

The Northern Black Sea province of Zonguldak is covered with fog, Nov. 7, 2021.

Istanbul's lifeline ferry services were canceled due to the fog, Nov. 7, 2021.

Yalova's ferry services were affected as well when visibility dropped as low as 50 meters.

A person walks along Galataport, Istanbul, Nov. 7, 2021.

An aerial view of Istanbul covered in fog, Nov. 6, 2021.

Ortaköy mosque shrouded by fog in Istanbul, Nov. 6, 2021.

People fish on the Galata Bridge in Istanbul, Nov. 7, 2021.

Traffic inching over a bridge in Istanbul, Nov. 6, 2021.

Beşiktaş covered in fog before the day dawns, Istanbul, Nov. 7, 2021.

An empty street in Edirne, Nov. 7, 2021.