Tornadoes also take a heavy toll on human lives. Table 5t-2 describes the ten most deadliest tornado events in the United States. From 1986 to 1995, only 418 individuals perished. This reduction is even more astonishing when you consider that the population of the United States doubled from 1935 to 1990. Ten deadliest tornado events in the United States.
Tornadoes can cause considerable damage to natural and human made structures on the Earth's surface.
Often, they also cause the injury and death of people. One particular event that set new monetary records in destruction occurred in Oklahoma on May 3, 1999. During this time period, about 70 tornadoes were spawned along a 240-kilometer long swath that began in southwest Oklahoma. Oklahoma receives more tornadoes per square kilometer than any other region found on our planet. It also receives most of these severe events in the month of May when warm moist air from the Gulf of Mexico interacts with cold fronts descending from the northwest.