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.
Madarganj to Mrizapur Tornado. As one of the most recent of the deadliest tornadoes in history, an estimated 700 people perished after a huge tornado touched down from Madarganj to Mrizapur in Bangladesh on May 13, 1996. multiple-vortex tornado, different from a family of tornadoes, includes several areas of rotation inside of a single tornado. Regardless if this incident featured one tornado or two, it was at the time one of the deadliest and most destructive natural disasters in history.