So this happened in 1919:

Panorama of the Molasses Disaster site

On January 15th, 1919, in what was probably the most bizarre disaster in United States' history, a storage tank burst on Boston's waterfront releasing two million gallons of molasses in a 15 ft-high, 160 ft-wide wave that raced through the city's north end at 35mph destroying everything it touched.

And then this week, this happened: