Chicago Severe Weather July 12, 2023 7:26 pm Watch: Tornado forms over O'Hare Airport live during NBC Chicago coverage The threat of severe weather, including tornadoes and flash flooding, is rising on Wednesday afternoon, according to the National Weather Service. Local 2:04 High-speed police chase ends on Chicago's South Side 3:08 Couple with Chicago ties detail harrowing experience as destructive wildfires impact Los Angeles area 2:04 Chicago city buildings now solely running on renewable energy 2:01 Is U.S. prepared for escalating bird flu cases? Experts sound alarm on issue 2:35 2025 Chicago Boat Show kicks off season at new location in Rosemont