The fog was so thick it killed people in their beds. London, December 1952. For five days, coal smoke, factory pollution, and cold still air trapped the city under a yellow-brown cloud. Buses stopped. People walked with their hands on walls. Hospitals filled. Morgues filled. At first, officials treated it like another London fog. But when it lifted, around 4,000 people were already dead. Later estimates put the toll closer to 12,000. No bomb fell. No plague arrived. London poisoned itself to keep warm. Four years later, Parliament passed the Clean Air Act. But for thousands of people, it was already too late. Would you have survived the Great Smog? #BritishHistory #DarkHistory #LondonHistory #HiddenHistory #HistoryReels