Calgary air quality advisory continues for second straight day

Beware the air out there, New West

Fine particulate matter, also known as PM2.5, refers to airborne solid or liquid droplets with a diameter of 2.5 micrometres or less.

"Continued fire activity from the Carr, Mendocino Complex, and OR fires continue to send smoke into the area", the NCUAQMD stated in the announcement.

If the air quality isn't too bad and you absolutely must go on that hike or bike commute, try wearing a mask.

As 11 large fires raged in California, there were hotspots of unhealthy air quality in certain parts of the state - especially near the wildfires.

A value of 50 or below represents good air quality with little potential to affect even those with respiratory conditions, while a value over 300 represents hazardous air quality and is likely to affect even healthy individuals.

Air quality across much of worse than in one of the world's most notoriously polluted cities. But regional air quality monitors note that the air is now "unhealthy for everyone", not just sensitive groups.

The weather service says an air quality alert for eastern Washington and northern Idaho has been extended into Friday morning.

People who may be sensitive to air pollution should be particularly careful.

Under these conditions, the Department of Ecology recommends that outdoor time should be limited and strenuous outdoor activity should be avoided. Check the air quality forecast regularly at the Puget Sound Clean Air Agency's website.

Air conditions should be set to recirculate and windows should be closed.

N95 or N100 rated masks can help protect some people from air pollution.

Nineteen wildfires are burning across more than 300,000 acres in Washington and OR, filling the skies with thick smoke.

The government in British Columbia declared a state of emergency with 566 wildfires burning.

Gordon adds weather systems aren't expected to change enough in the next few days to clear out the smoke.

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