Halifax Harbour Explosion - (Reading > Information)

A. On the morning of December 6, 1917, the French cargo vessel SS Mont-Blanc, laden with approximately 2,925 tonnes of high explosives including TNT, picric acid, and benzol, collided with the Norwegian relief ship SS Imo in the narrows of Halifax Harbour, Nova Scotia. The Mont-Blanc caught fire following the collision, and its crew abandoned the burning vessel, which drifted toward Pier 6 in the densely populated Richmond district. At 9:04 a.m., the ship detonated in what remains the largest human-made explosion prior to the development of nuclear weapons, devastating nearly two square kilometres of the surrounding area.

B. The explosion generated a massive pressure wave, a tsunami in the harbour, and a towering column of white smoke that rose over 3,600 metres into the sky. Approximately 2,000 people were killed instantly or died shortly afterward from injuries, and an estimated 9,000 others were wounded. The Richmond neighbourhood, situated closest to the blast, was virtually obliterated. Roughly 1,600 buildings were completely destroyed, and another 12,000 were damaged. Hundreds of survivors suffered permanent blindness, many of whom had been watching the burning ship from their windows when the explosion shattered the glass.

C. Relief efforts commenced almost immediately, though they were severely hampered by a blizzard that struck Halifax the following day, blanketing the devastated city in over 40 centimetres of snow. Nonetheless, aid poured in from across Canada, the United States, and beyond. The state of Massachusetts dispatched a trainload of medical supplies, doctors, and nurses within hours of receiving news of the disaster. This swift and generous response from Boston fostered a lasting bond between the two cities. Consequently, Nova Scotia has sent a large Christmas tree to Boston every December since 1971 as an enduring expression of gratitude.

D. The Halifax Explosion profoundly influenced the development of emergency preparedness and urban planning in Canada. In the aftermath, the Halifax Relief Commission was established to oversee reconstruction and compensate victims, becoming one of the country's earliest large-scale disaster management bodies. The rebuilt neighbourhoods incorporated wider streets and improved building codes designed to mitigate future catastrophic damage. Today, the disaster is commemorated annually on December 6 at Fort Needham Memorial Park, which overlooks the site of the explosion. The Halifax Explosion Memorial Bell Tower, erected in 1985, stands in the park as a solemn tribute to those who perished.

E. Not given in any of the above paragraphs.