2. Tri-State, U.S.A (1925)
Affecting the areas of Missouri, Illinois and Indiana, this tornado ranked as F5 tornado with wind speeds of over 300 mph. But the fact that the high fatality rate of this disaster could be avoided is a sad reality. The attempt of the weather forecasters to not create panic among the citizens proved to backfire horribly when they announced that it was going to be a fair day instead.
Death Toll : 695