Inside Air Safety During Wildfire Smoke
When Canada’s fires push thick smoke across the nation, many wonder if the air inside their homes stays clean. The truth is that smoke particles can seep indoors and cause health problems such as coughing, wheezing, headaches, itchy eyes, sore throats, sinus pain, chest tightness, a quick pulse and tiredness.
These tiny particles are far smaller than the width of a hair strand, so when they enter the body they can travel deep into the lungs. People who already have breathing issues, like asthma, as well as children, seniors and pregnant women are especially vulnerable.
Experts advise staying inside and shutting windows and doors when outdoor air quality worsens. Yet smoke can still infiltrate houses through natural airflow, HVAC systems and building walls, according to the American Society of Heating, Refrigerating and Air‑Conditioning Engineers.
Protect Indoor Air
- Know the Outside AQI
The Air Quality Index (AQI) measures five pollutants and gives a clear picture of how dangerous the air is.- AQI > 150 = unhealthy conditions
- AQI > 300 = hazardous
Most weather apps display the AQI, so you can plan when to stay indoors or open windows.
- Seal Your Home
If the index climbs, seal your home, turn on air‑purifying systems if you have them, and consider using a HEPA filter to trap the fine particles that may still drift inside.
By staying informed about outdoor air quality and taking simple steps to seal your living space, you can reduce the risk of smoke‑related health issues even when the fire’s reach extends far beyond your doorstep.
