Reuters: Severe weather of violent thunderstorms and possibly tornadoes hit parts of the upper Midwest on Wednesday, causing flights to be canceled and baseball games to be postponed in Chicago, the nation's third-largest city.
Some 12 million people in four states live in the area at high risk of storms that include baseball-size hail, possible strong tornadoes and heavy rainfall that could result in flash flooding, the National Weather Service said.
By late afternoon, tornado warnings had been issued...