WMO warns that wildfires and heatwaves are degrading global air quality

The World Meteorological Organization (WMO) issued a warning on September 7, 2026, stating that increasingly severe wildfires and heatwaves are undermining global efforts to improve air quality and protect public health. WMO scientist Lorenzo Labrador emphasized that air quality and climate change are inextricably linked, noting that when one condition deteriorates, the other follows suit.

The annual report identifies fine particulate matter (PM2.5) and ground-level ozone as the primary pollutants, both of which are strongly linked to respiratory and cardiovascular diseases. In 2025, PM2.5 concentrations reached significantly above-average levels in northern Canada, parts of Russia, central-western Africa, and north-western Spain, primarily due to intense wildfire activity. Additionally, the report examines the impact of aerosols, such as black carbon and microplastics, which contribute further to atmospheric degradation and toxic smoke exposure.