On July 4, 2024, Michael Marshall of Paso Robles and Dalton Smith of Templeton watched fireworks illuminate the sky over Huntington Beach’s ocean and pier. L.A.’s Fourth of July tradition is vibrant, with multiple official events and numerous unofficial displays. However, this celebration leaves behind harmful gases, soot, and toxic metals that affect air quality.
The South Coast Air Quality Management District (South Coast AQMD) warns of hazardous air pollution levels across central and southern Los Angeles County, northern Orange County, and Riverside and San Bernardino counties. This pollution is anticipated from 5 p.m. Saturday to 3 p.m. Sunday. Northern Los Angeles County and southern Orange County may also face unhealthy air conditions.
Pollution is expected to intensify with increased firework activity and light winds on Saturday evening. According to a South Coast AQMD advisory, the resulting smoke and particulates will likely persist until Sunday afternoon before dispersing.
Firework pollution can cause respiratory issues, asthma attacks, and heart problems, Los Angeles County Public Health reports. Those experiencing severe cardiovascular symptoms, such as chest pain or breathing difficulties, should seek immediate medical help. The American Lung Association notes that home fireworks pose higher risks due to closer proximity to the ground.
South Coast AQMD states July 4 and 5 are typically among the region’s worst air quality days. This year follows a late June warehouse fire in Boyle Heights that emitted unusual amounts of smoke, comparable to previous wildfire-related pollution.
To mitigate health risks, the L.A. County public health department advises minimizing strenuous activities and keeping doors and windows closed. Using whole house fans or swamp coolers may introduce more pollutants. Air purifiers or air conditioners are recommended instead.
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