October 1780: The Deadliest Month

The Newfoundland Hurricane of September 1775, latterly dubbed the “Independence Hurricane,” killed an estimated 4,000 people—but it wasn’t the deadliest Atlantic hurricane during the Revolutionary War.

On 6 Sept 1776, a hurricane hit the French island of Guadeloupe and killed about 6,000 people. And that wasn’t the deadliest of the period, either.

The era’s worst storm was the Great Hurricane of 1780, which roared across the Caribbean on 10-16 October. It reportedly knocked down every tree and every house on Barbados, and damaged every fort. About 4,500 people died on that island.

At Port Castries on Saint Lucia, rough seas destroyed Admiral George Rodney’s Royal Navy fleet. A ship landed on the port’s hospital and totaled the building. About 6,000 people died.

A fleet of forty French ships involved in the war in America capsized off Martinique, with the loss of about 4,000 soldiers. The 25-foot storm surge on that island killed about 9,000 more people. Another storm surge on Saint Eustatius took 4,000 more lives.

There was heavy damage on many other Caribbean islands, and historians estimate the total deaths as 20,000 to 27,500 people within one week.

As a comparison, the total number of American fighters dying during the entire Revolutionary War from all causes (most dying in camps or prisons) is about 25,000. Historians think the total number of British military deaths is about 44,000.

The Great Hurricane of 1780 was not only the deadliest storm of the Revolutionary War, but the deadliest hurricane ever in Atlantic history. And two other storms caused 1,000 deaths apiece in the same month.