Hamilton, Burlington, Brantford and surrounding areas are expected to see smoke from wildfires in Western Canada impact the air Thursday night into Friday morning, says Environment Canada.

The weather agency issued a special air quality statement, warning that wildfire smoke "is causing or expected to cause poor air quality and reduced visibility.

"As smoke levels increase, health risks increase," read the statement. "Limit time outdoors. Consider reducing or rescheduling outdoor sports, activities and events."

Mild symptoms like headaches, eye, nose and throat irritation, or mild cough are common, said Environment Canada, but "more serious" and "less common" symptoms like wheezing, chest pain and severe cough are also possible.

The people more likely to be impacted are those "aged 65

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