Ontario has been considered a summer peaking grid since 2000, however due to particularly cold winter temperatures and moderate summer temperatures, Ontario was winter peaking in 2014. In its 18-Month Outlook issued September 2014, the Independent Electricity System Operator (IESO) predicts a winter 2014–2015 peak of 22,149 MW under a normal weather scenario, and a summer 2015 peak of 22,808 MW, also under a normal weather scenario. The all-time record for Ontario demand was set on August 1, 2006, when peak demand for electricity reached 27,005 megawatts. (See 2006 North American heat wave.)