(Reuters) -Severe thunderstorms tore through the Chicago area on Sunday night after the National Weather Service said a “confirmed large and extremely dangerous tornado” had touched down in a western suburb of the city, causing damage.

Chicago-area utility Commonwealth Edison’s (ComEd) website showed that more than 22,000 customers were without power as the thunderstorms swept through the region, near Lake Michigan in the north of the U.S. state of Illinois.

The tornado touched down near Route 53/75th Street in Woodridge, DuPage County, around 11 p.m. ET on Sunday. About a dozen homes were damaged, and four people were rushed to area hospitals with minor injuries, CBS Chicago reported.

A CBS Chicago reporter tweeted that six people were injured in total and some residents were evacuated to nearby shelters. The news outlet added that there were no fires, but there were lots of gas breaches.

Fire Chief Mark Puknaitis said that anyone who was displaced from their homes could go to Ranchview Elementary School, which was designated as a place of shelter, according to CBS Chicago.

The website of ComEd, a unit of Exelon Corp, showed about 12,000 customers were without power in DuPage County alone while about 8,000 customers were in the dark in Cook County, which includes Chicago.

“The severe threat has diminished/ended for most of the Chicago metro area. Severe T-storm Watch remains in effect for a bit longer for Will, Kankakee, Ford, Iroquois, and northwest Indiana counties,” NWS Chicago said on TwitterQ.

(Reporting by Radhika Anilkumar and Kanishka Singh in Bengaluru; Editing by Christopher Cushing, Emelia Sithole-Matarise and Mark Heinrich)