100 years ago in Boston: The day molasses was deadly fast

FILE - In this Jan. 15, 1919, file photo, the ruins of tanks containing more than 2 million gallons of molasses lie in a heap after erupting along the

FILE - In this Jan. 15, 1919, file photo, the ruins of tanks containing more than 2 million gallons of molasses lie in a heap after erupting along the

In this Wednesday, Jan. 2, 2019, photo, a person walks along Commercial Street near where a giant storage tank of molasses burst on Jan. 15, 1919, in

In this Wednesday, Jan. 2, 2019, photo, a person walks along Commercial Street near where a giant storage tank of molasses burst on Jan. 15, 1919, in

In this Wednesday, Jan. 2, 2019, photo, cars are parked along Commercial Street near where a giant storage tank of molasses burst on Jan. 15, 1919, in

In this Wednesday, Jan. 2, 2019, photo, cars are parked along Commercial Street near where a giant storage tank of molasses burst on Jan. 15, 1919, in

In this Wednesday, Jan. 2, 2019, photo, a placard commemorating the Great Molasses Flood rests on a wall at the site of the 1919 disaster in Boston's

In this Wednesday, Jan. 2, 2019, photo, a placard commemorating the Great Molasses Flood rests on a wall at the site of the 1919 disaster in Boston's

BOSTON (AP) — Boston is marking the 100th anniversary of its most peculiar disaster — the Great Molasses Flood of 1919.

Exactly a century ago Tuesday, a massive wave of 2.3 million gallons (8.7 million liters) of molasses unleashed by a ruptured storage tank came crashing through the city's North End, obliterating everything in its path.

Twenty-one people were killed, along with dozens of horses, and 150 were injured.

This molasses was anything but slow. Historians say the initial wave of goop raced through the neighborhood at 35 miles per hour (56 kilometers per hour) — so fast not even Olympic champion sprinter Usain Bolt could have outrun it.

Suspicion at first fell on anarchists who were active at the time. But investigators determined the hulking tank was built with the same type of flawed steel used in the Titanic.