Dust and smoke from wildfires and storms on the Southern plains brought hazy skies and poor air quality across the Chicago area Saturday, the National Weather Service said.On Friday, parts of Texas, Missouri, Arkansas and Oklahoma were ravaged by hurricane-force winds and tornadoes that killed at le ast 16 people and leveled homes. More than 100 million people were estimated to be affected, and evacuations were ordered in Oklahoma because of fires.The storms kicked up dust across swaths of the South that strong winds blew north, darkening the sky across much of Illinois."It's really dry," National Weather Service meteorologist Brett Borchardt said. "It just picked up a lot of dust, and the wind direction came from there."Severe thunderstorms hit the Chicago area late Friday, bringing damaging winds. Crews were out Saturday assessing the damage and trying to determine whether any tornadoes had touched down west of Chicago in areas ubckydubg Elburn, DeKalb, Sycamore and Geneva as well asf northwest Indiana, Borchardt said.After mild weather Friday and Saturday, the temperature in Chicago is expected to plunge Sunday into the high 30s and upper 40s, with some accumulating snow possible. ...read more read less