SPOKANE, Wash. -

The Spokane Regional Clean Air Agency issued a Stage 2 burn restriction in Spokane Sunday afternoon.

According to the agency "cold and calm weather patterns and wood heating have resulted in a build-up of harmful smoke particles, prompting a restriction on indoor and outdoor burning."

The Stage 2 burn ban restricts the use of any wood stove, pellet stove, fireplace insert or fireplace in the Smoke Control Zone, and all outdoor burning countywide, until conditions improve.

If wood is your sole heat source, you're asked to call Spokane Clean Air at (509) 477-4727 for an exemption.

You can check current conditions by calling the Burning Information Hotline at 477-4710.