WMO Bulletin Detailed Rising Wildfire Smoke Threats
The World Meteorological Organization highlighted that wildfire smoke episodes have tripled globally since the 1990s.
Updated on Sept. 22, 2026 in Asthma
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On September 7, 2026, the World Meteorological Organization released its annual Air Quality and Climate bulletin. The report indicated that extreme wildfire smoke episodes have tripled globally since the 1990s, contributing to significant annual health risks.
Why it matters
Increased rural fire activity and heat waves drive rising PM2.5 and ozone pollution levels. These climate extremes are expected to become more frequent, further intensifying global public health risks.
Wildfire smoke resulted in nearly 100,000 additional deaths annually between 2010 and 2018. Current models potentially underestimate fire-attributable mortality by up to 93%.
The players
World Meteorological Organization
This is a specialized agency of the United Nations responsible for promoting international cooperation on atmospheric science and climatology.
The details
Extreme smoke episodes have become significantly more common, with smoke events tripling since the 1990s. In 2025, elevated PM2.5 concentrations were recorded in regions including northern Canada, the Russian Federation, and central-west Africa, while China remained below long-term averages.
Timeline
The 1990s marked the start of tracking for global wildfire smoke episodes.
Nearly 100,000 annual fire-related deaths occurred between 2010 and 2018.
Specific regions faced elevated PM2.5 levels throughout 2025.
The WMO released its annual air quality bulletin on September 7, 2026.
The Big Picture
The reported rise in climate-driven fire activity illustrates the ongoing challenges in achieving the air quality improvements envisioned by the 2015 Paris Agreement climate targets.
Rising levels of tropospheric ozone and PM2.5 can exacerbate respiratory issues for individuals with conditions like asthma. Patients should monitor local air quality alerts to minimize outdoor exposure during periods of high heat and smoke.
The takeaway
Climate-driven pollution cycles are altering long-term air quality, necessitating greater awareness of how environmental conditions impact individual respiratory health. Staying informed about local air quality trends helps individuals proactively manage their exposure to harmful pollutants.
Further reading
Learn more about how environmental factors affect respiratory conditions in our Asthma section.
Source note: This article includes information reported by PlusNews.
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