The 1948 Donora smog was a historic air inversion resulting in a wall of smog that killed 20 people and sickened 7,000 more in Donora, Pennsylvania city of 14.000.
Овде маглата седеше 4 дена. Колку луѓе умреа во Скопје...
http://en.wikipedia.org/wiki/Donora_Smog_of_1948The Great Smog of '52 or Big Smoke[1] was a severe air-pollution event that affected London during December 1952.
It lasted from Friday 5 to Tuesday 9 December 1952
However, government medical reports in the following weeks estimated that up until 8 December 4,000 people had died prematurely and 100,000 more were made ill because of the smog's effects on the human respiratory tract. More recent research suggests that the total number of fatalities was considerably greater, at about 12,000.
http://en.wikipedia.org/wiki/Great_Smog