The Great Smog, which blanketed the British capital for five days in December 1952, is estimated by some experts to have killed more than 12,000 people and hospitalized 150,000. Thousands of animals also died.
During a cold snap on Dec. 5 that year, sulfur particles mixed with fumes from burning coal and made the yellow fog smell like rotten eggs. Some Londoners reported being unable to see their feet, and transportation was canceled with the exception of the London Underground. Birds flew into buildings, and robberies increased as thieves were able to make a leisurely getaway.
The smog eventually lifted on Dec. 9, after cold winds swept the fumes out to the North Sea.
The incident eventually led to the Clean Air Act of 1956, restricting the burning of coal in urban areas in the United Kingdom.
A team of scientists now believe they have spotted possible signs of this fog renewal. They will know within the next coming weeks.
For now, Michiganders should stock up on food and keep their loved ones close, as this fog is deadly and is more than likely here to stay.