We could see or smell smoke in the air today.
Environment Canada says smoke plumes from forest fires in Alberta and British Columbia are drifting into the area.
That could reduce air quality if the smoke descends to ground level.
Individuals may experience symptoms such as increased coughing, throat irritation, headaches or shortness of breath.
Children, seniors, and those with cardiovascular or lung disease, such as asthma, are especially at risk.