How many people can an F4 tornado kill?

Death tolls vary widely depending on where the tornado hits, how wide the path of destruction is, and how well-prepared the people are. The deadliest tornado that is known to have been an F4 killed at least 255 people as it swept through St. Louis, Missouri and East St. Louis, Illinois in 1896. Many more dead may not have been counted as their bodies were washed down the Mississippi River. On the other hand, many F4 tornadoes have gone without killing anyone, and modern warnings and medical advances have cut fatalities to less than half of what they were a century ago.

Since 1950 there have been 564 F4 and EF4 tornadoes resulting in 2357 deaths, or an average of about 4 deaths per tornado. The deadliest of these had a death toll of 94, but its rating is in dispute; it might have been an F5.