Despite the return of most public Fourth of July celebrations and fireworks shows this year, Iowa vendors are still seeing nearly unprecedented demand. "There's more options this summer in terms of going out to a restaurant or a park to celebrate the Fourth ... but we're still seeing an incredible demand," Terhark said. "We're seeing a lot of newbies and people who enjoyed setting off their own last year coming to pick things up. There'll be more and more as we get closer to July 4." Iowa Fireworks Company planned ahead for this year, making orders earlier than normal, and are still barely keeping up due to shipping delays caused in part by a shortage of available international shipping containers.