(Portland, OR) -- The City of Portland has imposed a burn ban for the summer. It includes recreational campfires, fire pits, yard debris, and agricultural burns. Outdoor barbecuing with grills, smokers and other appliances are allowed, but they urge caution. Use them on non-flammable surfaces. If you use briquettes, put the ashes in a metal container and soak them with water for a few days before disposing of them.