Urban Wildfire Smoke Could Pose Long-Term Health Risks

Studies show survivors may carry toxic metals for months, which is worth discussing with your doctor if you live in fire-prone areas.

Updated on Oct. 15, 2026 in Asthma

Urban Wildfire Smoke Could Pose Long-Term Health Risks

Live Poll

Do you feel adequately informed about the long-term health risks following an urban wildfire in your area?

Recent research reveals that urban firestorms expose survivors to dangerous levels of toxic metals from burned man-made materials. These pollutants can persist in the body for months and may impact lung function in those residing near affected areas.

Why it matters

When wildfires destroy homes, they release hazardous substances like lead, arsenic, and asbestos that are not present in wildland-only fires. Understanding this exposure is critical for long-term health management and respiratory care in increasingly fire-prone regions.

A study of 1,400 Maui survivors found elevated levels of toxic metals in urine samples for up to 18 months post-fire. While participants with the highest concentrations showed lower lung function test scores, this is an ongoing observation of survivors.

The players

South Coast Air Quality Management District

The agency responsible for monitoring air pollution and air quality standards in the Los Angeles region.

UCLA

A research university that conducted analysis on the smoke composition from the 2025 Eaton Fire.

The details

Urban firestorms incinerate materials like lead-based paint, insulation, copper wiring, and plastics, which aerosolize into toxic smoke plumes. Researchers measured air particles during the 2025 Eaton Fire and found lead concentrations up to 250 times higher than normal levels. These heavy metals can remain in the body long after the smoke clears, potentially affecting respiratory health through prolonged systemic accumulation.

2018: Paradise, California wildfire occurred.
2021: Louisville, Colorado wildfire occurred.
2023: Maui wildfire occurred.
2025: Eaton Fire occurred.

Health Landscape

Wildfire health research is shifting from a focus on general particulate matter to the specific chemical dangers posed by urban firestorms. As the number of homes at risk of wildfire has risen by 50 percent, the potential for mass exposure to man-made toxins has become a significant public health concern.

If you live in or have recently evacuated from an area affected by a structure fire, monitor your respiratory health for persistent changes. Discuss your specific exposure history and any breathing difficulties with your primary care physician to determine if specialized lung function testing is needed.

The takeaway

Toxic metal exposure from burning synthetic materials presents a unique, long-term health risk for wildfire survivors. If you were exposed to wildfire smoke, track any new respiratory symptoms and consult your doctor to discuss how environmental factors might be affecting your lung health.