Upper panel of the plot shows population-weighted high and low temperature for each day (note: day-1 has high temperature only). Lower panel shows the forecast electricity demand for the service area of the company, in percentage of the normal demand expected under normal weather conditions during this 7-day period.
as observed at Oak Island, Brunswick County Airport
About Brunswick EMC (NC): Serving 70,000 locations in Brunswick and Columbus counties, and parts of Robeson and Bladen counties. (see website)