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Air quality advisory lifted for Metro Vancouver and the Fraser Valley

Click to play video: 'Metro Vancouver’s dry summer' Metro Vancouver’s dry summer
WATCH: Metro Vancouver has received less than half the usual amount of rainfall this summer. Ted Chernecki discusses the possible impact, and the bright side – Aug 29, 2017

An air quality advisory has been lifted for Metro Vancouver and the Fraser Valley.

Metro Vancouver issued the advisory on Tuesday, due to high concentrations of fine particulate matter in the air from wildfires in Washington, Oregon, and northern California.

READ MORE: B.C. wildfires prompt air quality advisory for Metro Vancouver, Fraser Valley

Officials now say conditions have improved thanks to a change in weather patterns.

WATCH: What to do when there is an air quality advisory

Click to play video: 'What to do when there is an air quality advisory' What to do when there is an air quality advisory
What to do when there is an air quality advisory – Jul 18, 2017

Tuesday’s advisory came weeks after the region lifted another air quality advisory issued after smoke from the B.C. wildfires ensconced the region in a thick haze.

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That warning was in place for nearly two weeks, and was the longest air quality advisory in the region since Metro Vancouver implemented its advisory system in the 1970s.

The region had also warned of high levels of ground-level ozone in eastern areas of Metro Vancouver and the Fraser Valley due to hot weather conditions.

Ground-level ozone isn’t emitted directly into the air, and generally hits its highest levels during mid-afternoon and early evening.

WATCH: Global BC coverage of air quality advisories

During the advisory, people were warned to avoid strenuous activities outdoors, particularly during the mid-afternoon.

Fine particulate matter and ground-level ozone are of highest concern for seniors, infants, and people with underlying respiratory conditions.

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READ MORE: Metro Vancouver air quality worse than Beijing: St. Paul’s respirologist

Anyone who experiences symptoms, such as coughing, wheezing, shortness of breath, or chest discomfort should seek medical advice.

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