Thick smoke from wildfires across the west and northwest are plaguing multiple states, with thick smoke and unsafe air quality, including Colorado.
Smoke may not affect all areas at all times. Kitsap County and areas near the Cascade foothills are experiencing air quality ranging from moderate to unhealthy for sensitive groups.
For those wanting a break from the smoke, Saxton said indoor spaces with air conditioning tend to have the cleanest air.
During "very unhealthy" conditions, everyone is encouraged to stay indoors, avoid strenuous activity, close windows and doors, set air conditioners to recirculate, and use a HEPA air filter if possible. If you have to go outside to walk the dog, keep it short to protect both person and pet.
On Sunday afternoon, several monitors in north-central Washington state showed air quality at hazardous levels. Unhealthy air will be common across the lowlands, according to the National Weather Service.
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Thick smoke in Denver blocked the view of some of Colorado's famous mountains and prompted an air quality health advisory for the northeastern quarter of the state.
Now, another index conveys just how risky the air quality is.
Environment Canada warned that some of the particulate matter is small enough to "easily penetrate indoors" and said infants and seniors were among the people most likely to feel respiratory symptoms.
Officials say air quality over the area is poor because of smoke from wildfires and terrain that traps smoke in valleys. Learn more about building your own air purifier by clicking here. A typical surgical mask won't do the trick. At least 16 flights at Kelowna International Airport were cancelled or delayed on Sunday, while cancellations were also reported at airports in Penticton and Castlegar.