The environment ministry has issued a road dust advisory for Burns Lake.
High concentrations of coarse particulate are expected to hang around until there is some rain or dust suppression.
Officials say the dust levels tend to be the highest around busy roads and industrial operations.
People with chronic underlying medical conditions should postpone strenuous exercise near busy roads until the advisory is lifted. Exposure is particularly a concern for infants, the elderly and those who have diabetes, and lung or heart disease.
Real-time air quality observations and information regarding the health effects of air pollution can be found at www.bcairquality.ca.