Historical peak: Hydro-Québec asks for the public's cooperation to reduce power consumption

Historical peak: Hydro-Québec asks for the public's cooperation to reduce power consumption | Press releases | Newsroom:

Hydro-Québec is anticipating record power consumption due to the extremely cold weather conditions prevailing now and forecast for the next few days. System demand is expected to reach a historical peak of 39,000 MW, exceeding the 37,717-MW peak recorded on January 24, 2011

All of its production facilities are in operation. However, in order to give the utility greater operating margin, Hydro-Québec is asking for cooperation from the public to reduce power consumption during peak periods. 

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While Hydro-Quebec may have all "production" facilities in operation, it also chose to shut it's lone nuclear reactor in December, following an election last year.
It also pays to keep a private (Transcanada) combined-cycle gas turbine generation station idle.