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Story summary
- Washington, D.C. issued a Code Red Air Quality Alert that fireworks smoke made air unhealthy for seniors, children and people with medical conditions.
- Hourly particulate matter rose to 6.7 times pre-fireworks levels, hitting EPA-defined unhealthy thresholds for sensitive groups at every sensor, while National Park Service advised spectators to wear N95 masks.
- DC emergency services logged 96 patient contacts and 40 transports from the National Mall after the fireworks display.
