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Air Quality Advisory for Eastern Metro Vancouver and the Fraser Valley Regional District (MAP)

Fraser Valley – The Fraser Valley Regional District has been issued BOTH a heat waning and an air quality advisory. The Air Quality Advisory for eastern Metro Vancouver and the Fraser Valley Regional District is because of high concentrations of ground-level ozone that are expected to persist for the next couple of days during the hot and sunny weather. The current forecast indicates hot temperatures through Saturday, with some cooling on Sunday.

Metro Vancouver is also monitoring conditions associated with wildfire smoke from fires burning in the interior of B.C. and Washington. Wildfire smoke models are forecasting that smoke from these fires may reach parts of Metro Vancouver and the Fraser Valley Regional District on Saturday and continuing in to Sunday. A change in the weather on Monday is forecast to bring onshore winds to help clear the smoke. Smoke concentrations may vary widely across the region as winds and temperatures change, and as wildfire behaviour changes.

Interactive maps can be found at firesmoke.ca – click here

firesmoke.ca- July 30, 2021

Ground-level ozone is not emitted directly into the air. It is formed when nitrogen oxides (pollutants emitted when fuels are burned) and volatile organic compounds (emitted from solvents and other sources) react in the air in the presence of sunlight. The highest levels of ground-level ozone are generally observed between mid-afternoon and early evening on summer days.

Avoid strenuous outdoor activities during mid-afternoon to early evening, when ozone levels are highest, especially if breathing feels uncomfortable. Consider choosing easier outdoor activities, such as walking instead of running, where you don’t have to breathe as hard. Exposure is particularly a concern for people with underlying conditions such as lung disease, heart disease, chronic obstructive pulmonary disease (COPD) including bronchitis and emphysema, as well as asthma, and/or diabetes; individuals with respiratory infections such as COVID-19; pregnant women and infants; children; outdoor workers (e.g. construction and agricultural workers); and older adults. Individuals who are socially marginalized may also be at elevated risk (e.g. people who are experiencing homelessness or are underhoused).

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