Fireworks have long been a staple of Fourth of July celebrations in the United States, dazzling crowds with their colorful explosions and patriotic spirit.

Yet behind the festive glow, experts are warning that these displays can conceal serious health dangers, especially for those with respiratory or heart conditions.

According to the American Lung Association, nearly 300 million pounds of fireworks are released into the sky each year across the country. The resulting smoke includes microscopic particles and gases such as sulfur dioxide, carbon dioxide, and carbon monoxide, which the group describes as “very harmful to our lungs.”

The smoke also contains fine metals, including aluminum, manganese, and cadmium. In some cases, illegal fireworks may add lead to the mix, which the association calls “extremely dangerous” because of the lasting health damage it can cause.

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“Inhaling any of these chemicals can irritate the lungs, making it hard to breathe and causing serious health problems, which is why it is important to avoid firework smoke whenever possible,” the organization said in a public advisory.

Air pollution levels typically rise by an average of 42% on the Fourth of July, a 2015 study found. That spike can be especially hazardous for those living with asthma or chronic obstructive pulmonary disease, often leading to flare-ups or worsening symptoms.

The link between fine particle pollution and health problems has been established in previous research cited by the lung association, showing connections to heart attacks, strokes, lung cancer, and premature death.

Children, older adults, pregnant women, and individuals with preexisting lung or heart diseases are considered particularly at risk during fireworks celebrations, the group warned.

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Dr. Afif El-Hasan, who serves on the board of directors for the American Lung Association, spoke with Fox News Digital about practical steps people can take to stay safe during holiday events.

El-Hasan advised avoiding home fireworks altogether and instead watching community shows from a safe distance. People with asthma should keep a rescue inhaler nearby in case smoke triggers symptoms, he said, and wearing a well-fitted N95 mask can help limit exposure to fine particles.

“If you are familiar with the area and the wind patterns, try to be upwind from the fireworks display and avoid areas where smoke may accumulate,” El-Hasan said.

He also encouraged spectators to attend events with others so help is available if a medical issue arises. Those who take preventive medications should ensure they have done so before the show begins. Parking nearby can also make it easier to leave quickly if needed.

After the event, El-Hasan suggested drinking water to help clear the upper airway and changing clothes immediately upon returning home to prevent smoke residue from lingering.

For anyone experiencing shortness of breath or chest pain after exposure to fireworks smoke, seeking prompt medical care is essential, the expert advised.