An air quality advisory has been issued for eastern Metro Vancouver and the Fraser Valley due to pollution. In a news release issued Thursday afternoon, Metro Vancouver is cautioning the public about hot, sunny weather that is causing increased levels of ground-level ozone. Ground-level ozone is produced when pollutants produced by burning fuels — such as gasoline and oil — react in sunlight and stagnant air. The advisory says strenuous outdoor activities should be avoided during the mid-afternoon to early evening — when the highest ozone levels are generally observed — especially if it becomes difficult to breathe. The advisory reminds people to stay cool and hydrated by seeking relief at indoor shelters with air conditioning.

Source: CBC News July 31, 2020 00:33 UTC