On a December morning in Halifax two ships kissed in a narrow channel, and one of them was a floating bomb. The explosion flattened a square mile, blinded hundreds who had pressed to the glass to watch the fire, hurled a tsunami up the harbour — and a single dying telegraph operator's last message may have saved a trainload of people.
The complete story of December 6, 1917: how the munitions ship Mont-Blanc and the relief vessel Imo collided in the Narrows, and how twenty minutes of fire turned into the deadliest man-made disaster of its era.
The exhaustive account: the ~2.9 kilotons of TNT equivalent, the mushroom cloud, the shattering of every window for kilometres, and the roughly 2,000 dead and 9,000 injured in a wartime port.
Train dispatcher Vince Coleman ran back to his telegraph key as the burning ship drifted toward the pier — and stayed to warn an incoming passenger train while the seconds ran out.
The dispatcher who could have fled but instead tapped out a warning to the overnight train from Saint John — some 300 people aboard — moments before Mont-Blanc detonated and killed him.
Because people crowded to their windows to watch the fire, the blast wave drove glass into their eyes: roughly 850 blinded, some 250 eyes surgically removed in two weeks. The horror helped birth the CNIB.
Boston's doctors and Red Cross reached the ruined city through a blizzard within a day. In thanks, Nova Scotia has sent Boston a giant Christmas tree nearly every year since — a debt still openly paid.
A tight retelling that situates the disaster in scale — the benchmark against which scientists later measured the atomic bombs, and a level of destruction no human act surpassed for 28 years.