Fireworks are a summertime staple and an iconic element of Independence Day celebrations. However, many people don’t realize that the resulting smoke is hazardous. The American Lung Association is educating the public on the risks associated with firework smoke and sharing tips to enjoy these spectacular displays more safely.

When fireworks explode, they release irritating gases and harmful metals, including carbon monoxide, aluminum and cadmium, into the air. Firework smoke also contains tiny particles, known as particulate matter (PM), which can irritate the lungs, trigger asthma attacks and cause other respiratory symptoms. It’s also important to note that particulate matter levels tend to be elevated not only during the fireworks, but for hours or even days afterward. The amount of pollution depends on how big the fireworks are, how long they last, and the weather conditions at the time. Breathing in firework smoke is unhealthy for everyone, but children, older adults, those who are pregnant and individuals with lung or heart disease are especially vulnerable.