For those heeding public health advice to reduce exposure, here are photos and videos that show the conditions outside.
Image | Cda-Wildfires 20230606
Caption: Someone walks a dog along the Ottawa River in Ottawa as smoke from wildfires obscures Gatineau, Que., in the distance on Tuesday. (Sean Kilpatrick/The Canadian Press)
Image | ottawa wildfire forest fire smoke
Caption: Smoke from wildfires in Ontario and Quebec over Parliament Hill in Ottawa on Tuesday. (Sean Kilpatrick/The Canadian Press)
Caption: A view from a drone of the area west of Ottawa's LeBreton Flats on Tuesday. (Félix Desroches/CBC)
Image | Ottawa skyline
Caption: A view of downtown Ottawa from Gatineau, Que., as wildfire smoke blankets the city on June 6. (Arthur White-Crummey/CBC)
Image | ottawa wildfire forest fire smoke drone
Caption: A view from a drone of Ottawa's LeBreton Flats and areas further west on Tuesday. (Félix Desroches/CBC)
Image | Smoke in Ottawa
Caption: Pedestrians walk across Wellington Street in downtown Ottawa on Tuesday. Ottawa's air quality is so bad that it cracked through the top of a risk scale that morning. (Mathieu Theriault/Radio-Canada)
Image | kingston wildfire forest fire smoke
Caption: Wildfire smoke blankets Kingston, Ont., on Tuesday. (Dan Taekema/CBC)
Image | kingston wildfire forest fire smoke
Caption: Wildfire smoke blankets Kingston on Tuesday. All of eastern Ontario and western Quebec are under some sort of air quality advisory. (Dan Taekema/CBC)
Image | kingston lake ontario wildfire forest fire
Caption: Wildfire smoke obscures the view off Lake Ontario next to downtown Kingston on Tuesday. (Dan Taekema/CBC)
Image | ottawa gatineau smoke fire air quality
Caption: People read an information placard as wildfire smoke covers the skyline in Ottawa-Gatineau on Monday, when there were also local air quality advisories. (Spencer Colby/The Canadian Press)
Image | ottawa gatineau smoke fire air quality
Caption: The Ottawa River and Parliament Hill covered in wildfire smoke on Monday. (Spencer Colby/The Canadian Press)
Image | greater madawaska forest fire centennial lake
Caption: South Frontenac Fire & Rescue were one of the services helping fight the forest fire near Centennial Lake in eastern Ontario's Township of Greater Madawaska. (South Frontenac Fire & Rescue/Facebook)
Media Video | CBC News Ottawa : Flames visible from the water as forest fire burns west of Ottawa
Caption: Dozens of homes have been evacuated in the Township of Greater Madawaska after a forest fire broke out Sunday afternoon.
Media Video | CBC News Ottawa : Watch as smoke rises over Centennial Lake in Greater Madawaska
Caption: A forest fire broke out in eastern Ontario's Township of Greater Madawaska Sunday afternoon according to Ontario's Ministry of Natural Resources and Forestry. (Greg Carruthers)