Halifax Explosion Dec 6, 1917 - At Halifax, the French munitions ship Mont Blanc collided with the Belgian relief ship Imo. The resulting explosion, the largest before the advent of the atomic bomb, killed more than 1600 people and injured 9000 in Canada's worst disaster.
The SS Mont-Blanc. On Thursday morning, 6 December 1917, she entered Halifax Harbour in Nova Scotia, Canada laden with a full cargo of highly volatile explosives and was involved in a collision with the Norwegian ship, SS Imo. A fire aboard the French ship fire ignited her cargo of wet and dry picric acid, TNT and guncotton. The resultant Halifax Explosion levelled the Richmond District and killed approximately 2000 people.