Air quality improves across much of B.C., but risks remain in some communities

The Air Quality Health Index is showing most areas of Metro Vancouver are now at low risk – but some communities are still facing risks.

Air quality readings showed improvement across much of the Lower Mainland and Vancouver Island Thursday morning, but health experts warn some communities are still facing elevated smoke risks.

According to the Air Quality Health Index (AQHI), Metro Vancouver, Vancouver Island and the Central Fraser Valley were at Low Risk, meaning conditions were ideal for outdoor activities. The Eastern Fraser Valley was reporting Moderate Risk, while Squamish remained at High Risk, with residents – especially children, seniors and those with existing health conditions – urged to limit strenuous outdoor activity.

What the risk levels mean:

• Low: Safe to enjoy normal outdoor activities.
• Moderate: Consider reducing or rescheduling strenuous outdoor activities if you’re experiencing symptoms like coughing or throat irritation.
• High: Reduce or reschedule strenuous activities outdoors. Children, the elderly and those at risk should take extra care.

Health impacts and precautions

Naomi Zimmerman, an associate professor at UBC and Canada Research Chair in real-world air quality sensing, says the public should pay close attention to these daily ratings.

“When these episodes occur, it’s important for people to monitor their own health. If you’re feeling symptoms like headaches, coughing or dizziness, take action. Stay indoors, close your windows, or find a clean-air space like a library or community centre,” she told CTV News.

Zimmerman notes that air quality monitoring tools, such as the AQHI map and localized data available at aqmap.ca, can help people make decisions about whether to adjust their daily activities.

A growing seasonal concern

Wildfire smoke has become a near-annual issue in B.C., with climate change driving longer and more intense fire seasons.

“We are seeing increased wildfire smoke activity in the region as a result of climate change,” Zimmerman explained. “Combined with more awareness and monitoring, people are both experiencing these events more frequently and recognizing their impacts more clearly.”

What you can do

Health officials recommend:

• Staying indoors with windows and doors closed, if your space is temperature-controlled and safe.
• Using a portable air cleaner or finding a nearby public building with filtered air.
• Delaying or moving strenuous activities, like running, indoors if smoke levels remain elevated.

Zimmerman adds that smoke episodes can last until major weather systems move through the region, meaning risks could persist into September or even early October.

“Even if advisories change day to day, people should check in with their own health,” she said. “If you’re noticing symptoms, take steps to protect yourself and those around you.”