The heavy smoke in Prince George is being caused by a shift in the wind, which is bringing smoke from wildfires in the Cariboo up north.
BC Wildfire Service Fire Information Officer Amanda Reynolds says up until Friday winds were coming from the north and pushing all the smoke to the lower mainland, but then it shifted to a southwesterly wind, which is why Prince George is now blanketed in smoke.
There are no new wildfires in the Prince George Fire Centre.
Reynolds said the Cariboo Fire Centre also saw increased winds yesterday, which caused very aggressive fire behaviour and caused wildfires to exhibit a lot of smoke, adding to the conditions in Prince George.
The smoky conditions are expected to remain for the next couple days.
Air quality is extremely poor in the area, and the general population is being asked to reduce or reschedule strenuous activities outdoors, especially if you experience symptoms such as coughing and throat irritation. Children and the elderly should also avoid outdoor physical exertion.