/tags/polar-vortex Polar Vortex en-US Copyright Tue, 02 Aug 2016 17:30:56 GMT /environment/2016-08-02/a-warming-climate-means-duke-energy-can-count-on-more-record-breaking-power-spikes Duke Energy Carolinas customers used a summertime record amount of energy last week. The only time the company saw a higher use was during the polar… Tue, 02 Aug 2016 17:30:56 GMT /environment/2016-08-02/a-warming-climate-means-duke-energy-can-count-on-more-record-breaking-power-spikes Rebecca Martinez