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The Great Molasses Flood of 1919
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On a January afternoon in Boston, a massive steel tank holding over two million gallons of molasses ruptured without warning.
A wave of thick, sticky syrup up to 25 feet high surged through the streets at an estimated 35 miles per hour, destroying buildings, sweeping away wagons and horses, and killing 21 people.
An Industrial Disaster, Not a Freak Accident
Investigators later found the tank had been poorly built and inadequately tested, and had been leaking for years before it failed catastrophically. The company had painted it brown to hide the leaks rather than fix them.
The disaster led to some of the first serious engineering regulations requiring proper structural review and sign-off before construction — a direct legal legacy of a tragedy most people have never heard of.
Would this disaster have happened if anyone had actually listened to the early warning signs?
