1 3 0   km / h ); ▁the ▁highest ▁being ▁reported ▁in ▁Manh attan . ▁A ▁small ▁torn ado ▁was ▁reported ▁in ▁Bol ing bro ok ▁in ▁a ▁Du Page ▁County ▁Forest ▁Pres erve . ▁The ▁storm s ▁shut ▁down ▁air ports ▁( including ▁O ' H are ▁International ▁Airport ▁and ▁Mid way ▁International ▁Airport ), ▁up root ed ▁trees ▁and ▁left ▁over ▁ 6 0 0 , 0 0 0 ▁residents ▁in ▁northern ▁Illinois ▁without ▁power , ▁some ▁for ▁several ▁days . ▁The ▁storm s ▁also ▁caused ▁flo oding ▁on ▁streets ▁and ▁major ▁express ways ▁such ▁as ▁the ▁Bishop ▁Ford ▁Fre ew ay . ▁Rain fall ▁tot als ▁in ▁Bo one ▁and ▁La S alle ▁Count ies ▁to pped ▁ 1 9 8 7 ▁records . ▁Governor ▁Rod ▁B lag o jev ich ▁declared ▁Mc Hen ry , ▁Lake , ▁Cook ▁( including ▁Chicago ), ▁Du Page , ▁and ▁K ane ▁count ies ▁to ▁be ▁dis aster ▁areas ▁after ▁the ▁storm . ▁Flo oding ▁across ▁northern ▁Illinois ▁was ▁w ides p read ▁in ▁the ▁after math ▁of ▁the ▁storm s . ▁Al ong ▁the ▁Rock ▁River ▁in ▁By ron , ▁the ▁river ▁reached ▁moder ate ▁flo od ▁stage ▁on ▁August ▁ 2 4 ; ▁moder ate ▁stage ▁is ▁above ▁ 1 4   fe et   ( 4   m ). ▁Official s ▁in ▁O gle ▁County ▁recommended ▁that ▁people ▁in ▁low - lying ▁areas ▁along ▁the ▁Rock ▁River , ▁and ▁along ▁Kill bu ck ▁Creek ▁near ▁L inden wood ,