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.
Tri-State Tornado of 1925. Written By: Tri-State Tornado of 1925, also called Great Tri-State Tornado, tornado, the deadliest in U.S. history, that traveled from southeastern Missouri through southern Illinois and into southwestern Indiana on March 18, 1925. The storm completely destroyed a number of towns and caused 695 deaths. 1  The tornado materialized about 1:00 pm local time in Ellington, Missouri. 2  With winds of roughly 300 miles (480 km) per hour, the tornado lasted 3.5 hours and traveled 219 miles (352 km)âsetting records for both duration and distance.