SALT LAKE CITY (AP) — Smoke filled the skies of Utah Friday as a cold front swept wildfire smoke into the state. National Weather Service meteorologist Christine Kruse tells KSL.com the front moving in from the west picked up smoke from fires in California and Oregon, including the growing Dixie Fire that leveled a small California town earlier this week. The air quality got so bad that the site WorldIQ Air ranked the air quality in Utah’s capitol among the worst in the world. Several school canceled outdoor athletics as officials warned against spending time outside. The bad air could linger through the weekend.