Southern California is bracing for potentially hazardous air quality levels from Saturday evening through Sunday afternoon due to the widespread use of fireworks for the Fourth of July holiday. The South Coast Air Quality Management District has issued advisories warning of increased pollution across several counties.
Hazardous air pollution is anticipated in central and southern Los Angeles County, northern Orange County, and Riverside and San Bernardino counties from 5 p.m. Saturday until 3 p.m. Sunday. Unhealthy air quality is also expected in northern Los Angeles County and southern Orange County.
The South Coast AQMD predicts that pollution levels will escalate from Saturday evening as lighter winds coincide with increased firework activity, leading to a buildup of smoke. Fine soot and particulate matter are expected to persist through Sunday afternoon before atmospheric conditions disperse them.
According to Los Angeles County Public Health, the effects of firework pollution can include triggering coughs, respiratory difficulties, asthma exacerbations, and heart attacks. Individuals experiencing severe or worsening cardiovascular symptoms, such as chest pain or shortness of breath, are strongly advised to seek immediate medical attention.
The American Lung Association notes that fireworks set off at residences may pose a greater risk for cardiovascular issues due to the concentrated release of pollutants closer to the ground. Historically, July 4 and 5 represent two of the worst days annually for air quality in the region, according to the South Coast AQMD.
The Los Angeles County Department of Public Health recommends limiting strenuous outdoor activities and keeping windows and doors closed to mitigate health impacts. The department also suggests utilizing air purifiers or air conditioners instead of whole house fans or swamp coolers, which can draw additional pollutants indoors.
