In Oklahoma alone, more than 150 blazes were burning, which have destroyed almost 300 structures and killed at least one person.

The National Weather Service's Storm Prediction Center warned of "near historic" fire conditions in the Plains.

The North Texas region is under critical or extreme fire threats on Friday, according to the National Weather Service.

At least 12 fatalities have been reported in Missouri, according to the Missouri State Emergency Management Agency. The deaths come as a massive storm system moving across the country unleashed winds that damaged buildings, whipped up deadly dust storms and fanned more than 100 wildfires.

The most fatalities as of Saturday morning were in Missouri, authorities said, with an estimated 11 people killed.