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air quality

Wildfire seasons in numerous regions have grown longer and more intense over recent years, and their effects are no longer confined to communities near the fires themselves. Smoke plumes routinely travel long distances, degrading air quality in cities far removed from any active fire. As exposure has become more frequent and more widespread, researchers have shifted from studying acute effects of smoke exposure toward the harder question of what repeated, seasonal exposure does to respiratory health over years.

• Acute exposure is well established to worsen asthma and chronic obstructive pulmonary disease and to increase hospital admissions for respiratory and cardiovascular causes during smoke events.
• Some research suggests wildfire-derived PM2.5 may be more toxic per unit of mass than PM2.5 from other common pollution sources, though this remains an area of active investigation.
• Emergency department visits for respiratory complaints have shown clear, measurable spikes that track closely with local air quality index readings during smoke events.