5. The Halifax Explosion – December 6, 1917
In the quiet harbor of Halifax, the collision of two cargo ships—one loaded with explosives—set off the largest man-made explosion prior to the atomic age. The massive blast leveled neighborhoods, killed thousands, and left lasting scars on the city. This tragedy, though largely forgotten outside Canada, revolutionized emergency response and urban planning. Halifax’s resilience in the aftermath became a model for disaster recovery. Learn more about this pivotal event here.
