At least 18 people were killed Sunday by three separate tornadoes spawned by a powerful storm system that moved through the central and southern United States. The Arkansas Department of Emergency Management confirmed early Monday that at least sixteen people had died after a tornado tore through central Arkansas, while an Oklahoma county sheriff's dispatcher reported that one person had died in the town of Quapaw, near the state's borders with Kansas and Missouri. Fox News has also confirmed that one person died when a tornado hit Keokuk County, Iowa. Please keep these folks in your thoughts and prayers.