The air quality index measures PM2.5, less than 2.5 microns particles, to determine the intensity of air pollution in cities.

That stands in contrast to the smoke from the 2023 Canadian wildfires that drifted to New York and other American states hundreds of miles away, causing spikes in emergency room visits for asthma.

In 2023, Canadian wildfires caused significant decline in air quality in New York, and much further afield (Credit: Getty Images) The air we breathe can have profound effects on our physical and ...

The composition of a wildfire can also have an impact on human health. With the California fires engulfing homes and businesses, smoke in the region is likely carrying chemicals released from ...

Learn about the lasting impact of wildfire smoke on urban surfaces and human health. Discover how these toxic pollutants ...

The massive scale of the Los Angeles wildfires means even people whose homes didn't burn down face health concerns from ...

In the summer of 2023, as smoke from Canadian wildfires engulfed the East Coast, Wright wrote on LinkedIn that “the hype over wildfires is just hype to justify” harmful climate policies.

That's the most in a decade. That year, Canadian wildfires sent smoke sweeping across much of the U.S., engulfing the New York City skyline for days under an orange sky. And the fires have continued.

Researchers have shown that plumes of wildfire smoke can carry contaminants hundreds of kilometres, leaving a toxic and lingering footprint which has the potential to be re-released into the ...

“As you breathe in smoke, it gets caught inside your sinuses ... of Public Health worked on a recent study after the 2023 Canadian wildfires that have shown significant increases in eczema ...

From the Los Angeles blazes to other surprise wildfires in 2025, you could be threatened by smoke. Here's how to guard yourself against it.