On May 16, a rare dust storm pushed across northern Illinois, northern Indiana and the Chicago metropolitan area. Pictured here is the storm approaching Bloomington, Illinois. Soil and Water ...

The slow-moving cloud — known as a haboob — hit parts of Phoenix and Arizona City, 60 miles to the southeast, late Monday ...

Three main factors contribute to the formation of Midwest dust storms: strong winds, dry soil in farm fields and large amounts of loose soil.