Boston Molasses Disaster occurred in 1919. No, this is not a hoax; this was a terrible disaster. On this day in 1919 a huge tank holding about 2,300,000 gallons of molasses ruptured, sending a tsunami of molasses into the streets of the North End part of Boston. Moving at 35 miles per hour, the molasses wave leveled buildings, trapped people, and even hurled a truck into Boston Harbor. About 21 people died, and 150 more were injured. Children could read The Great Molasses Flood by Deborah Kops. They could also watch a very interesting video at: Boston Molasses Disaster.