With nearly all of the aerial shells, paper rockets and sparkly fountains that fuel America’s Fourth of July celebrations being imported from China, volunteer groups like Johnson’s and cities big and small have been closely watching the negotiations.

The U.S. trade war with China has sharply curbed fireworks imports. "The timing of the tariffs couldn't have hit at a worse time," one industry rep says.

Denver residents are stocking up at fireworks stands across the city despite uncertainty surrounding tariffs that could impact pricing.