text: A deadly tornado moved across parts of the southwestern Chicago, Illinois suburbs killing three people and injured 23 others. The tornado, with winds over 200 mph moved from Lemont to Downers Grove causing $13 million in damage when 87 homes were destroyed, and another 90 were damaged. The tornado passed over the Argonne National Laboratory, peeling part of a roof of the building housing a nuclear reactor. The tornadoes movement was somewhat erratic moving southeast to the north and finally turning northwest.