On Wednesday at 12:30 p.m. the National Weather Service released an air stagnation advisory valid from Friday 4 a.m. until Monday 4 a.m. for Oregon Lower Treasure Valley as well as Harney, Baker and Malheur counties.

The weather service states to be ready for, "An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants."

"Poor air quality may cause issues for people with respiratory problems," explains the weather service. "Persons with respiratory illness should follow their physicians advice for dealing with high levels of air pollution during periods of stagnant air."

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