strength not too long later. The tornado reached a peak size of 0.25 - 0.5 miles wide with a debris ball around 2 miles wide. The tornado at this point was starting to enter Darien, causing even more damage there. The tornado crossed I-55 near the IL 83 interchange not too long later. At around 11:35pm, the tornado roped out in the southwest Chicago suburb of Willow Springs. Geography According to the 2021 census gazetteer files, Darien has a total area of , of which (or 98.22%) is land and (or 1.78%) is water. Darien's City Hall used to be totally underground until 1994, when it was lifted up. Now only 75% is underground. Darien's City Hall is surrounded on three sides by the village of Downers Grove. The entire south edge of Darien backs up to Waterfall Glen Forest Preserve, which is home to one of the only old-growth, pine wood forests in the area. It also offers a 773-acre "Bluff savanna", with hiking trails, horseback trails and boat access to the nearby Des Plaines River. The Rocky Glen Waterfall, located within the preserve, is a popular swimming destination in the summer. Darien is bordered by the cities of Downers Grove, Westmont, Woodridge, Lemont, and Willowbrook, and it has easy access to the three major thoroughfares crossing Chicago's southwest suburbs: Interstate 55, Interstate 355, and Interstate 294. Demographics As of the 2020 census there were 22,011 people, 8,697 households, and 6,297 families residing in the city. The population density was . There were 9,368 housing units at an average density of . The racial makeup of the city was 74.28% White, 3.40% African American, 0.23% Native American, 13.09% Asian, 0.07% Pacific Islander, 2.39% from other races, and 6.55% from two or more races. Hispanic or Latino of any race were 8.40% of the population. There were 8,697 households, out of which 42.58% had children under the age of 18 living with them, 56.53% were married couples living together, 10.08% had a female householder with no husband present, and 27.60% were non-families. 23.31% of all households were made up of individuals, and 11.29% had someone living alone who was 65 years of age or older. The average household size was 2.98 and the average family size was 2.51. The city's age distribution consisted of 17.9% under the age of 18, 7.3% from 18 to 24, 25% from 25 to 44,