The most fatalities as of Saturday morning were in Missouri, authorities said, which was lashed by twisters overnight.
Hundreds of homes and other buildings were destroyed in Oklahoma, as fierce winds and wildfires swept the region.
The massive storm system moving across the country unleashed winds that triggered deadly dust storms and fanned more than 100 ...
The National Weather Service's Storm Prediction Center warned of "near historic" fire conditions in the Plains.
Authorities say more than 130 wildfires were reported in 44 counties across Oklahoma on Friday, and many are still active Saturday.