2021 Naperville–Woodridge tornado

On the evening of June 20, 2021, an intense QLCS tornado affected the Chicago suburbs of Naperville, Woodridge, Darien, Burr Ridge, and Willow Springs in DuPage and Cook Counties in Illinois. The tornado struck well after dark and was rated an EF3, with estimated wind speeds of up to 140 mph (230 km/h). It had a path length of 14.8 mi (23.8 km) and reached a width of 600 yd (550 m), while causing 11 injuries, downing thousands of trees, and inflicting significant structural damage primarily across Naperville and Woodridge. It was the strongest tornado spawned by a severe weather outbreak that was associated with a surface low over Wisconsin. The severe weather outbreak produced 17 tornadoes across parts of the United States and Canada.

In the immediate aftermath, the damage was described as "extensive", with 900 properties damaged, 300 of which were considered significantly damaged, and 29 deemed uninhabitable. The non-profit Naperville Tornado Relief raised over one million dollars to aid in cleanup effort in 2023, and repair efforts continued into 2024. It was the strongest tornado in the Chicago metropolitan area since the 2015 Coal City tornado, and the first major tornado in DuPage County since the 1976 Lemont tornado.