- Continued smoke from Northern California wildfires, along with pollution from cars, has prompted the Bay Area Air Quality Management District to issue a Spare the Air alert for Sunday.
The Environmental Protection Agency has advised that everyone, and particularly people with heart or lung disease, older adults and children, should avoid "prolonged or heavy exertion" and outdoor activities.
The alert is the result of smoke from Canadian wildfires drifting across the region.
The Puget Sound Clean Air Agency's Saturday forecast for Pierce County was that smoke levels could be unhealthy for sensitive groups Sunday and could get worse Monday or Tuesday.
The entire province of Manitoba is under somewhat hazy skies and Environment Canada has issued an air quality alert.
Thick smoke from wildfires raging in British Columbia, Canada, and in the eastern portion of the state is expected to spread into western Washington starting Sunday.
Due to the poor weather, residents could experience symptoms like increased coughing, throat irritation, headaches or shortness of breath.