This list includes confirmed individual tornadoes which caused 100 or more direct fatalities. The deadliest tornadoes by far have occurred in a small area of Bangladesh and East India. In this 8,000-square-mile (21,000 km 2) area, 24 of the 43 tornadoes which are known to have killed 100 or more people occurred.This is probably due to the high population density and poor economic status of the area, as well as a lack of early-warning system.n this 8,000-square-mile (21,000 km 2) area, 24 of the 43 tornadoes which are known to have killed 100 or more people occurred.