A white mist
🌫 under the blue sky. A closer look will reveal the red bridge hidden in it. In different platforms, the smoke obscures the building
🏠. This emoji represents foggy or cold weather. Some people regard the white fog as clouds
☁️, which are used to represent towering buildings. When the air quality is not good, Instagram also uses it as air pollution. Related emoji:
🌥🌫
🌧🌉 .