The Boston Molasses Disaster

Charleston, South Carolina had its own Tea Party incident on December 3, 1773, 13 days before the one in Boston.


You learned about the Boston Tea Party in school, did you not? It was no picnic — It was a protest against taxes imposed on the colonies by the British government.

No one was hurt, and no property was damaged. Except, that is, for the 342 crates of tea, about 45 tons, that were dumped into the Boston Harbor on December 16, 1773. I wonder whether all that tea turned the water in the harbor brown…

We think of food in small portions — a glass of wine, a slice of pie, a delicate cup of tea. But food is big industry. The contents of that bottle or jar or box on the grocery shelf was once the tiniest fraction of gallons and tons of the same substance stored in massive tanks and silos.

This story is about molasses.

Molasses is a by-product of the manufacture of sugar from sugarcane or sugar beets. One of its industrial applications is its fermentation to produce ethanol for use in alcoholic beverages and in the production of dynamite. The Purity Distilling Company had a large tank for molasses beside Boston Harbor, in the North End, which was largely inhabited by Irish and Italian immigrant laborers and their families. When needed, the molasses was then piped to Purity’s ethanol plant in Cambridge. The tank was built in 1915, during World War I, when dynamite was in great demand. While the demand for dynamite diminished once the war ended, the demand for alcohol grew — these were the years leading up to Prohibition.

The tank was 50’ high, 90’ in diameter, and held up to 2,300,000 gallons of sticky molasses. The tank was not structurally sound or tested. And it was not well maintained. It had so many leaks that it was painted brown so the leaks could not be seen. Local residents were known to collect molasses from the leaks for use in their homes.

What could possibly go wrong?

On the day in question, January 15, 1919, the tank was nearly full — a fresh shipment from the Caribbean had just been unloaded. A combination of temperature changes and structural lack of integrity caused the tank to burst open and collapse a little after noon. The ground shook. The sound of machine gun fire turned out to be caused by the rivets shooting out of the tank. The wave of molasses, initially close to 50’ high, swept through the busy streets at 35 mph. It tipped a streetcar off its tracks and hurled a truck into the Boston Harbor. Nearby buildings were pushed off their foundations and collapsed. People and horses were caught in the sticky wave; some were swept into the harbor. Molasses oozed through doors and windows and trapped people inside. It flooded several blocks in the area to a depth of 2 – 3’. It spread through the streets, into streetcars and trains, and into homes.

As the temperature started to cool, the molasses hardened and rescue became difficult.

The Boston Molasses Disaster | Palmetto Bella

The area of the disaster in the aftermath of the molasses flood. Photo courtesy of the Boston Public Library.

It was one sticky mess!

In the end, countless horses were killed, 150 people were injured, and 21 people, ages 10 – 78, lost their lives. There was nothing left of the tank.

A class action lawsuit was brought against the United States Industrial Alcohol Company (USIA), owner of the Purity Distilling Company. The USIA initially claimed the tank had been blown up by anarchists because the alcohol was used in making munitions. In the end the USIA was found guilty and paid $628,000 in damages.

Ironically, the 18th amendment, which banned the manufacture, sale, and transport of alcoholic beverages, was ratified the day after the Boston Molasses Disaster and went into effect one year later.

The water in the Boston Harbor was stained brown until summer, and molasses continued to seep out of the ground on warm summer days for years.

The Boston Molasses Disaster | Palmetto Bella

Headline in the Boston Post the day after, before the full extent of the destruction was known. Image in the public domain.


The molasses used as a sweetener for food, known in Great Britain as black treacle, is made from sugar cane. You will find it as an ingredient in gingerbread, barbecue sauces, dark breads, cookies, and pies. The primary ingredient in Shoofly Pie is molasses, along with flour, brown sugar (because the molasses is not sweet or sticky enough?), egg, and water. It “began as a crust-less molasses cake called Centennial Cake in 1876 to celebrate the 100th anniversary of the signing of the Declaration of Independence in Philadelphia.” Crusts were added later. My guess is that the pie got its name from the flies it attracted.


In the London Beer Flood of 1814, failing wooden vats at the Horseshoe Brewery released 150,000 – 400,000 gallons of fermenting porter (dark beer) into the streets. 8 deaths resulted, but the courts ruled the disaster an “Act of God” and did not hold Meux & Co, the owner of the brewery, liable.

Picture of Robin Warren

Robin Warren

Robin Warren moved to Aiken from New Hampshire in 2016. Now mostly retired from nearly 3 decades of web designing, she now spends her time volunteering and editing Bella Magazine. And performing with her musical partner Brian Clancey under the name Spirit Fiddle. You can listen to their music at SpiritFiddle.com.
Picture of Robin Warren

Robin Warren

Robin Warren moved to Aiken from New Hampshire in 2016. Now mostly retired from nearly 3 decades of web designing, she now spends her time volunteering and editing Bella Magazine. And performing with her musical partner Brian Clancey under the name Spirit Fiddle. You can listen to their music at SpiritFiddle.com.

In the know

Related Stories

The Season of Change is Here! | Palmetto Bella

The Season of Change is Here!

Peeling off the layers and becoming who you truly are is hard work — it never comes easy. I know a lot of people that put on different faces depending on who is around them. Of course there is a business face when you are in a professional environment, a playful face when you are at home or out in nature, but that is not what I am referring to. I am talking about becoming your true authentic self. The you that has been pushed down due to life’s trauma, people’s negative opinion of you, hurts and pain — the things you think you can hide and never face, and

Read More »
OPEN - HANDED Generosity | Palmetto Bella

OPEN – HANDED Generosity

“I alone cannot change the world, but I can cast a stone across water to create many ripples.” MOTHER TERESA As we enter yet another month of the COVID-19 epidemic, I look around in wonder at the generosity I see in our community. Not only on the front lines in the ER, hospitals, police force, etc. but the dedicated service workers who continue to show up to keep a job, knowing they may be risking their own health as well as that of their families. What intrigues me the most is the generosity of those who daily continue to carry on the work of their churches and organizations manning the

Read More »
100 Christmases | Palmetto Bella

100 Christmases

I walked into the old farmhouse that housed four generations of the Jenkins family. Suddenly memories of Christmas Eve flooded my mind. I remembered so many details of that special night that made me laugh and shed a tear, but mostly, my heart swelled with gratitude. Uncle Bill was standing in the doorway with his fancy video camera with enough lights to illuminate a football stadium. So what I did I get for Christmas that year? Retina damage… I remembered my grandfather — we called Gumpa. He sat in his old burgundy chair with the wooden arms. It was his corner, almost a sacred place. He had a bird’s eye

Read More »
Palmetto Bella | The Ancient Traditions of Yule

The Ancient Traditions of Yule

Yule, also known as Yuletide, Yulefest, and Winter Solstice, has many traditions that are present in current day religions. If you like history as much as I do, come on an exploration journey with me. First, what is Yule or the Winter Solstice? Solstice is derived from the Latin words sol (sun) and sistere (to stand still). During this time of declination, the sun appears to be standing still. This year, that the solstice occurs on December 21. After this day, the days get longer until we reach the Summer Solstice. In ancient times, Yule was celebrated by the Germanic tribes of Northern Europe in anticipation of the return of

Read More »