A heat warning and a special air quality statement has been issued for Waterloo region, Guelph and surrounding areas.

Environment Canada says winds have carried smoke from northern Ontario, causing poor air quality in local areas.

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

The statement warns of common symptoms. It can range from milder symptoms like eye, nose and throat irri…