1925 Tri-State tornado outbreak
From March 17–18, 1925, one of the deadliest tornado outbreaks in recorded history generated at least 12 significant tornadoes and spanned a large portion of the midwestern and southern United States. In all, at least 751 people died, including men, women, and children.
Source: Wikipedia — 1925 Tri-State tornado outbreak (CC BY-SA 4.0)