THE GREAT BOSTON MOLASSES FLOOD
"Shortly after noon on January 15, 1919, a fifty-foot-tall steel tank filled with 2.3 million gallons of molasses collapsed on Boston’s waterfront, disgorging its contents in a fifteen-foot-high wave of molasses that traveled at thirty-five miles per hour. When the tide receded, a section of the city’s North End had been transformed into a war zone. The Great Boston Molasses Flood claimed the lives of twenty-one people and scores of animals, injured more than a hundred, and caused widespread destruction."
The above is quoted from author Stephen Puleo, who has published a wonderful book about the flood called "Dark Tide: The Great Boston Molasses Flood of 1919." It tells the story of what happened and also places the event in historical context. For more information on the book, you can visit his website at http://www.stephenpuleo.com.