Where this source supports the record
Each entry separates the article’s editorial relevance note from its exact, section-level claims. A bibliography link without a direct claim is labeled plainly.
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Open article references → Why editors use it hereDigitized archival collection with photographs, maps, personal records, official material, and research guidance.
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Quick read
On 6 December 1917, the French munitions ship Mont-Blanc and the Norwegian vessel Imo collided in the Narrows of Halifax Harbour.
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Trigger and conditions
After a sequence of disputed passing decisions, Imo struck Mont-Blanc at about 8:45 in the morning.
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Uncertainty
Fatality and injury totals differ among official lists, later research, and definitions of deaths caused by subsequent injuries.
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Why it matters
The Halifax Explosion shows how dangerous cargo, congested infrastructure, incomplete warning, and ordinary curiosity can combine within minutes.
Reviewed 4 August 2026
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Quick read