The Far-Reaching Effects of Wildfire Smoke

This editorial argues that climate-driven wildfires are an escalating respiratory-health emergency. Smoke containing high concentrations of fine particulate matter (PM2.5), ozone, and toxic gases can travel far beyond fire zones. Wildfire-specific PM2.5 appears more harmful to respiratory health than equivalent exposure to non-wildfire particulate pollution, increasing hospitalizations for asthma, chronic obstructive pulmonary disease (COPD), upper respiratory infections, influenza, and pneumonia. Children, older adults, people with chronic lung disease, outdoor workers, and socioeconomically disadvantaged communities face disproportionate risk. A large eight-country analysis found that each 1 µg/m³ rise in wildfire PM2.5 increased respiratory-hospitalization risks across multiple diagnoses, reinforcing the need for targeted mitigation. For CTSNet’s global audience, these findings are increasingly relevant to perioperative and transplant practice, as wildfire smoke may exacerbate chronic respiratory disease, strain acute-care capacity, and increase risk for vulnerable cardiothoracic patients. The article calls for preparedness, exposure-reduction measures, and equitable public-health interventions.