A special air quality statement is in effect for much of Southern Ontario, including Hamilton, and Halton.

Environment Canada says the region could experience high levels of air pollution due to smoke from forest fires in northwestern Ontario.

The weather agency says smoke plumes may move over southern Ontario causing poor air quality and reduced visibility.

Officials warn wildfire smoke is a constantly changing mixture of particles and gases which include many chemicals that can be harmful to your health.

Air quality may deteriorate if the smoke descends to ground level.

Residents 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.

It is the second time in two weeks a special air quality statement has been in effect for the region.

Roughly 130 forest fires are currently burning in northwestern Ontario. More than 600 trained wildland firefighters are working to get the fires under control.

Several First Nation communities and municipalities have declared emergencies in response to fire or smoke impacts, and evacuations.

Click on the below image to view an interactive forest fire information map by the Ministry of Natural Resources and Forestry.