Background Paragraph: Alberta's electrical demand varies throughout the day and across the seasons. When individuals are fixing supper and using home appliances, demand for power goes up, as it does during heat waves and cold snaps. It tapers off during spring and fall. Like other mechanical devices, generators fail from time to time. If they are wind-powered, their output varies with the wind. 
Story: Carl is in charge of a power generation station in Alberta. He is tasked with turning on or off certain generators in instances of high or low demand (High demand would require more generators to be turned on, and low turned off). There are various occasions that Carl has to be vigilant for, such as various times of the day; early morning, dinner time, late night. Weather conditions also play a roll, such as; colder weather, hot weather, or moderate weather. He also must be aware of wind conditions, as some of the power is garnered from wind power. 
Question: Would Carl be more likely to have to use more generators on a hot day or a moderate day?
hot day.