The story
Welcome to the edge of the North End. As you stand here in Langone Park, looking out over the harbor, it is hard to imagine that this peaceful spot was once the site of one of the strangest and most terrifying disasters in American history. If you look toward the area where the Little League field and the bocce courts are today, you are standing almost exactly where a massive, fifty-foot-tall steel tank once loomed over Commercial Street.
It was January 15, 1919. The air was unseasonably warm for a Boston winter, reaching nearly forty degrees. Inside that tank, over two million gallons of crude molasses were waiting to be distilled into industrial alcohol for munitions.
The tank was a local landmark, though not a popular one. It had been built poorly and rushed into service. It groaned and leaked so often that neighborhood children would commonly bring cups to catch the sweet drippings.
The owners had even painted the tank brown to hide the constant leaks. At roughly 12:40 PM, the rivets holding the steel plates together began to pop with the sound of rapid machine-gun fire. Then, the ground shook with a roar that witnesses described as a passing freight train.
The tank did not just leak; it disintegrated. A wall of dark, viscous liquid, twenty-five feet high and one hundred and sixty feet wide, surged onto Commercial Street. We often use the phrase slow as molasses, but this wave was moving at thirty-five miles per hour.
It had the weight of a mountain and the force of a tidal wave. It demolished the Atlantic Avenue Elevated railway, crushed buildings into kindling, and swept horses and wagons into the harbor. Twenty-one people lost their lives that day, and over one hundred and fifty were injured.
For weeks, the neighborhood was a sticky, brown nightmare. Thousands of volunteers and sailors from the USS Nantucket, which was docked nearby, spent days scrubbing the streets with salt water and sand. The harbor stayed brown until the following summer.
But the story did not end with the cleanup. This disaster led to one of the first major class-action lawsuits in Massachusetts history, forcing corporations to be held accountable for structural safety and engineering standards. And then, there is the legend.
For decades afterward, residents of the North End claimed that on the hottest, most humid days of August, you could still catch a faint, sweet, cloying scent of molasses rising from the pavement and the old stones of Commercial Street. As you walk along the waterfront today, take a deep breath. You might just catch a whiff of the ghosts of 1919.