Smoke and haze from forest fires in B.C.’s Interior forced officials yesterday to issue an air-quality advisory for the Lower Mainland and Fraser Valley.

Fine particulate matter was especially heavy at monitoring stations in Tsawwassen, Richmond, Kitsilano and Vancouver’s airport.

The poor air quality, which was expected to last for at least 24 hours, is particularly a concern for infants, the elderly, and people with heart and lung diseases.

Residents should avoid strenuous outdoor activities and stop those activities altogether if breathing becomes difficult. People who develop shortness of breath, chest discomfort or wheezing coughs should contact their doctor.