Smog
- 4,000 – The Great Smog (London, December 5–9, 1952)
- 2,200 – Coal smog (London, 1880)
- 160 – Smog (London, December 12–15, 1991)
- 60 – Meuse Valley smog (Belgium, 1930)
- 50 – The 1948 Donora smog (Donora, Pennsylvania, October 27–31, 1948)
Read more about this topic: List Of Accidents And Disasters By Death Toll