What Were the Worst Tornadoes in History?

The Tri-State Tornado 1 of 10

This funnel began on March 18, 1925 and is known to be the single most deadly tornado in history. With 625 confirmed deaths to its name, even the second deadliest tornado pales in comparison to this blustery beast. Stretching from Missouri to Southern Illinois, this funnel traveled over 200 miles from point of origin and ranks at the top as an F5 on the scale of destruction.