WEATHER EVENT THAT CHANGED HISTORY

THURSDAY, SEPTEMBER 10TH, 2020.-

🖊📸 weather History

Donora Smog Disaster

In the late days of October 1948, disaster struck the town of Donora, Pennsylvania. A weather phenomenon known as “air inversion” hit the town due to a flux of cold air coming from the west. Located within a valley and surrounded by peaks towering some 400 feet, Donora offered the perfect conditions for an inversion.

The phenomenon on its own isn’t dangerous. It blocks warm air close to the ground, while cold air flows above and a thick mist is generated. But mixing this trapped warm air with pollutants from a zinc smelting plant, steel mills, a sulphuric acid plant, coal burning steam locomotives and river boats is dangerous. 20 people died and another 6000 became ill because the pollutants couldn’t escape into the upper atmosphere. The Donorans were unknowingly breathing in large amounts of sulfur dioxide, soluble sulphants and fluorides.

The events led to a settlement of $250,000 for the victims’ families and the steel mill closing nine years later. The companies that owned the plants never assumed responsibility for the disaster, claiming it was “an act of God.” Nevertheless, it sparked a nationwide response, leading to the enactment of the Clean Air Act and the creation of the Environmental Protection Agency.

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