On August 28, 1990, from 3:15 to 3:45 p.m., the strongest tornado in northern Illinois in greater than 20 years struck the towns of Plainfield, Crest Hill, and Joliet in Will County. As a result of the storm's impact phase, 302 persons were injured (28 fatally). This report summarizes an investigation of injuries and deaths that resulted from the tornado's impact.