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Story summary
- The National Park Service will launch over 850,000 fireworks in Washington, D.C. on July 4, 2026, raising particulate levels about 42 % for 24 hours across 315 sites.
- Scientists warn drought could trap heavy-metal and perchlorate pollution in the Potomac, endangering amphibians, juvenile fish and nesting ospreys.
- The American Lung Association recommends staying indoors, sealing windows and using N95 masks, prompting Sam Schmitz to book a hotel outside Washington to escape the smoke.
