Cleanup Crews Used Seawater to Wash Molasses From Boston Streets

Fireboats blasted city streets to dissolve a river of sugar.

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Reports claimed that on warm days months later, molasses would still seep from cracks in the pavement.

After the 1919 flood, Boston faced streets coated in inches of hardened molasses. Traditional shoveling proved ineffective because the substance clung to brick and cobblestone. Authorities brought in fireboats from Boston Harbor to pump seawater into the affected neighborhood. The saltwater helped dilute and loosen the syrup. Thousands of gallons were sprayed daily in a massive cleanup operation. Even so, sticky residue persisted for months on building facades and sidewalks. The city effectively had to wash itself with the ocean.

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The logistical scale of cleanup rivaled that of natural disasters. Workers scraped, shoveled, and flushed continuously while dealing with freezing temperatures. The sugary runoff turned streets slick, prolonging hazards. Businesses remained closed for extended periods. Residents tracked molasses into homes and public transit. The entire neighborhood smelled sweet for weeks, an olfactory reminder of structural failure.

The embarrassment of needing maritime equipment to clean city streets highlighted the flood’s magnitude. Urban disaster planning had never anticipated a confectionery deluge. The operation demonstrated how even non-toxic substances can overwhelm municipal systems when released at industrial scale. Modern emergency response frameworks now include containment planning for food-grade bulk storage. Boston learned the hard way that sweetness in sufficient quantity behaves like catastrophe. A harbor city had to borrow its own sea to survive sugar.

Source

Smithsonian Magazine

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