CHICAGO (AP) — The National Weather Service says a tornado touched down near Chicago’s O’Hare International Airport prompting passengers to take shelter and disrupting hundreds of flights. There were no immediate reports of injuries. A confirmed tornado was on the ground around 7 p.m. Wednesday, according to the National Weather Service in Chicago. The National Weather Service had issued two tornado warnings for portions of the city Wednesday evening. Tornado sirens sounded at least twice across Chicago, warning people to take cover. The storm moved into Michigan before passing through the state and into Canada early Thursday. Tornado watches that were in effect for parts of Michigan, Indiana and Ohio all expired.