A prescribed burn to reduce wildfire risk is planned in Arroyo Grande this week, weather permitting.The Five Cities Fire Authority will be conducting the prescribed pile burning operation along The Pike on Friday, June 19.It was initially scheduled to take place on May 31 but was postponed due to unfavorable burning conditions.Fire officials say the purpose of this project is to reduce the buildup of eucalyptus slash along The Pike, as eucalyptu…