On December 6, 1917, a ship traveling to France that carried approximately 9,000 tons of wartime explosives caught fire after a collision in the Halifax Harbour. The fire quickly ignited the explosives. Approximately 1,800 were killed and 9,000 were injured by the fire, debris and collapsed buildings.

Here is an article on History.com: http://www.history.com/this-day-in-history/the-great-halifax-explosion

And following is a video of the footage after the explosion, showing devastation and relief effort. 

We’ve all read the headlines about catastrophic events. Don’t let an accident of this magnitude devastate your city.  Learn root cause analysis techniques to investigate near-misses, and take proactive steps to avoid a major disaster. (Click here to find out more about TapRooT® Root Cause Analysis Training.)