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November 11, 1979: Train derailment in Mississauga, Ontario

Staff writers
November 11, 2012 — On Sunday, November 11, 1979, the southern half of Mississauga, Canada's 9th largest city, became a ghost town.

A train derailment just before midnight on November 10th released a fireball into the air that could be seen as far away as Kingston.

One of the tanks contained chlorine gas, and officials feared that the wind would carry the deadly gas into nearby neighbourhoods.

More than a quarter of a million people were forced from their homes, making it the largest peace-time evacuation in Canadian history.

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