An Aug. 28, 1990, tornado killed 29 people and destroyed Plainfield High School. Plainfield is in Will County, which has had the most tornadoes in the area since 1950. Daily Herald file photo, August 1990

The weather forecast for Will County called for thunderstorms on Aug. 28, 1990. No advanced tornado warnings or watches were issued.

Then, an F5 twister tore into parts of Oswego , Crest Hill , Joliet and Plainfield , completely obscured by rain.

The storm killed 29 people and injured 353 more over a 16-mile stretch. It demolished Plainfield High School, a church and large portions of the town. The storm leveled homes and a large apartment complex in Crest Hill, and caused damage to homes and businesses on Joliet’s west side.

This tornado remains the only F5 tornado – the s

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