Business boom: Jersey city hopes weekly fireworks displays light up tourism Ron DeBrock, Hearst Illinois FacebookTwitterEmail Fireworks explode on the Mississippi River in Grafton. Free fireworks shows are planned simultaneously in Grafton and Alton on Thursday nights this summer as part of efforts by the Great Rivers & Routes Tourism Bureau of Southwest Illinois to bolster local businesses. John Badman | Hearst Illinois GRAFTON — Weekly fireworks will light the skies over this Jersey County community throughout the summer. Great Rivers & Routes Tourism Bureau of Southwest Illinois said the shows will begin at 9 p.m. every Thursday from June 3 to Sept. 9, except for July 1.