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September 11, 2026Short & citedBlog
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Kept by Bryan McAllister — short guides, clear facts, and the Canadian angle when it matters.
Civic Brief • Train Disaster

Lac-Mégantic disaster

The Lac-Mégantic disaster was a rail accident and explosion that occurred on 6 July 2013 in downtown Lac-Mégantic, Quebec, when an unattended freight train carrying crude oil derailed and caught fire.

Updated September 11, 20261 min readCited sources

The Lac-Mégantic disaster was a rail accident and explosion on 6 July 2013 in Lac-Mégantic, Quebec, when an unattended freight train carrying crude oil derailed and caught fire, killing 47 people and destroying much of the town centre.

What it is

The disaster involved a Montreal, Maine and Atlantic Railway freight train carrying about 7.7 million litres of crude oil. The train rolled unattended into Lac-Mégantic, derailed near the downtown core, and ignited, causing multiple explosions and a massive fire that devastated the area.

Why it matters

It is the deadliest rail disaster in Canada since 1864, killing 47 people and displacing about 2,000 residents. The event reshaped Lac-Mégantic, destroyed much of its downtown, and sparked major national debate on rail safety, hazardous-material transport, and emergency response.

Key details

The Transportation Safety Board identified unattended operation and inadequate handbrakes as principal causes. Three former rail workers were charged with criminal negligence causing death but were acquitted in 2018. The disaster prompted significant changes in Canadian rail regulations and remains a defining event in modern rail history.

In short

  • 47 people died in the 6 July 2013 derailment and fire.
  • The train carried about 7.7 million litres of crude oil in 72 tank cars.
  • It is Canada's deadliest rail disaster since 1864.
  • The disaster led to major rail-safety reforms and legal proceedings.
Canadian angle

The disaster is a major event in Canadian transportation and public-safety history, and it remains especially significant in Quebec because it reshaped Lac-Mégantic and influenced national rail-safety debate.[2][12][18]

Quick questions

What caused the Lac-Mégantic disaster?
The Transportation Safety Board said the accident was driven by factors including leaving the train unattended, insufficient handbrakes, and the absence of a backup safety mechanism.
How many people died?
Forty-seven people died.
Were people charged in connection with the disaster?
Yes. Three former rail workers were charged with criminal negligence causing death; they were later acquitted in 2018.

Sources

  1. Transportation Safety Board of Canada — https://www.tsb.gc.ca/eng/rapports-reports/rail/2013/r13d0054/r13d0054-r-es.html
    Supports: Train cargo, derailment details, casualties, evacuation, and investigation findings.
  2. Wikipedia — https://en.wikipedia.org/wiki/Lac-M%C3%A9gantic_rail_disaster
    Supports: Date, deadliness in Canadian rail history, and broad event overview.
  3. BBC News — https://www.bbc.com/news/world-us-canada-42548824
    Supports: 47 deaths, destructive impact, and criminal charges.
  4. BBC News — https://www.bbc.com/news/world-us-canada-42752119
    Supports: Acquittal of three former rail workers in 2018.
  5. CBC News — https://www.cbc.ca/news/canada/lac-megantic-10-year-anniversary-1.6899335
    Supports: 10-year commemoration and enduring Canadian significance.