Weekly fireworks coming to Alton, Grafton Ron DeBrock, [email protected] FacebookTwitterEmail Fireworks explode on the Mississippi River in Grafton in this file photo. 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. ALTON — Weekly fireworks are planned this summer in Alton and Grafton by the Great Rivers & Routes Tourism Bureau of Southwest Illinois. The fireworks shows will go off simultaneously at 9 p.m. every Thursday from June 3 to Sept. 9, except on Thursday, July 1. “We are celebrating our summer travel season and encourage people to get out and explore our region,” said Cory Jobe, President and CEO of the Great Rivers & Routes Tourism Bureau.