In 1806, within days of each other on September 9 and again -on September 20, 450 and 165 individuals on total were killed in two separate hurricanes. One of the hurricanes resulted in the death of 131 people died mainly as a result of the Roseau River shifting its course and flooding the capital
Source: https://goo.gl/wimDZD, https://goo.gl/8hQNUa