Though retailers have gotten some fireworks that shipped before tariffs were imposed, shipping costs are going sky-high.

Millions will gather across the U.S. for the dazzling sights of fireworks to mark the Fourth of July, but the tradition relies almost exclusively on China. The Asian country makes nearly all of the fireworks that are used in the U.

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.