Multiple outlets report that an internal National Park Service document cited by The Washington Post describes air-quality risks associated with Washington, D.C.’s upcoming large-scale fireworks show. According to the document, fireworks are planned across 10 sites on the National Mall, using about 850,000 shells. The reporting says the analysis projects elevated fine particulate matter (PM2.5) levels, characterizing them as hazardous air pollution. Fox News frames the development as a response to commentary about the fireworks, pointing to the projected PM2.5 concentrations drawn from the National Park Service materials. While the sources agree on the existence of the internal assessment and the scale of the fireworks, they do not provide additional details in the provided excerpts about specific forecast figures, dates, or mitigation measures. The articles therefore focus on the claim that the planned fireworks could significantly worsen local air quality due to fine particle emissions.