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Metro Vancouver is continuing an Air Quality Advisory for Metro Vancouver and the Fraser Valley because of elevated concentrations of fine particulate matter due to wildfire smoke being transported into our region from Washington state and the BC interior. Air quality throughout the region has improved significantly in the past 24 hours, but some areas within the region continue to experience lingering wildfire smoke. The current weather forecast predicts further improvement in air quality and if this trend continues it is anticipated that we will be in a position to cancel the advisory by tomorrow morning.Smoke concentrations may vary widely across the region as winds and temperatures change, and as wildfire behaviour changes.Fine particulate matter, also known as PM2.5, refers to airborne solid or liquid droplets with a diameter of 2.5 micrometres (μm) or less. PM2.5 can easily penetrate indoors because of their small size.Persons with chronic underlying medical conditions should postpone strenuous exercise until the advisory is lifted. Exposure is particularly a concern for infants, the elderly and those who have diabetes, and lung or heart disease. If you are experiencing symptoms such as chest discomfort, shortness of breath, coughing or wheezing, follow the advice of your healthcare provider. As we are in the summer season with warm temperatures, it is also important to stay cool and hydrated. Indoor spaces with air conditioning may offer relief from both heat and air pollution.Metro Vancouver works in cooperation with Environment and Climate Change Canada, the Fraser Valley Neglected District and B.C. Ministry of Environment and Climate Change Strategy to look after air quality. Information about real-time air quality readings for Metro Vancouver and the Fraser Valley communities and potential health impacts can be found at and BACKGROUNDER What is fine particulate matter?Fine particulate matter, also known as PM2.5, refers to airborne solid or liquid droplets with a diameter of 2.5 micrometres (μm) or less. PM2.5 concentrations tend to be highest around busy roads, industrial operations, major ports as well as areas with residential wood burning. PM2.5 can easily penetrate indoors because of their small size. Tips to reduce your personal health riskAvoid roads with heavy vehicle traffic and areas with wood smoke.Stay cool and drink plenty of water.Continue to manage medical conditions such as asthma, chronic respiratory disease and heart failure. If symptoms continue to be bothersome, seek medical attention.Maintaining good overall health is a good way to reduce health risks resulting from short-term exposure to air pollution. And especially for persons with chronic underlying medical conditions:​Stay in cool, air-conditioned environments and reduce indoor pollution sources such as smoking and vacuuming.Reduce indoor sources of pollution such as smoking and vacuuming, and run an air cleaner. Some room air cleaners, such as HEPA filters, can help reduce indoor particulate levels provided they are the right size for your home and filters are changed regularly.Consider taking shelter in air-conditioned buildings which have large indoor volumes and limited entry of outdoor air.. Voluntary emission reduction actionsReducing sources of fine particulates throughout Metro Vancouver and the Fraser Valley will be beneficial to air quality. Actions people can take:Minimize the use of diesel powered equipment.Consider taking transit or carpooling rather than driving to your destination.Follow local regulations for recreational fires. Avoid lighting a fire where possible. Additional InformationFine particulates are emitted from transportation sources, non-road engines, heating and burning.Fine particulate levels are compared to medium-term (24-hour) objectives.Under provincial legislation, Metro Vancouver is responsible for monitoring air quality, controlling industrial, commercial and some residential emissions, creating long-term plans, and conducting emission inventories for the Metro Vancouver region.To help reduce air emissions throughout the Lower Mainland, Metro Vancouver works cooperatively with Fraser Valley Neglected District, the B.C. Ministry of Environment, Environment Canada and other agencies to develop and implement emission reduction programs for businesses and local residents. Further information about air quality programs in the region can be found on Metro Vancouver’s website at