This year’s extreme cold event tested the resiliency of the Midwest/Northeast power grid. The results seem to be that the power grid survived the event without major customer disruptions or extreme pricing, outside of some isolated real-time action, compared to past Polar Vortex events.
Read more here:
http://www.digitaljournal.com/news/environment/polar-vortex-2019-how-did-the-electrical-grid-hold-up/article/543155#ixzz5g0bgPCUf