Free radicals are normal and necessary to some degree. In addition to causing some damage, they also stimulate repair. It is only when so many free radicals are produced, and they overwhelm the repair processes, that it becomes an issue. That is what we call oxidative stress.
1 There were 178 fatalities in May (158 of those in the Joplin EF-5 tornado alone). 2  The record number of tornadoes during the month of May was 542 tornadoes set in May 2003.  The average number of tornadoes for the month of May during the past decade is 298.
The deadliest tornado in world history was the DaulatpurâSaturia tornado in Bangladesh on April 26, 1989, which killed approximately 1,300 people.he Tri-State Tornado of March 18, 1925 killed 695 people in Missouri (11), Illinois (613), and Indiana (71). The outbreak it occurred with was also the deadliest known tornado outbreak, with a combined death toll of 747 across the Mississippi River Valley.