The trend of the future electricity supply is going towards a direction with higher penetration of renewables. For the traditional fossil fuel fired generating resources, we will see the generation greatly shift from coal fired generating resources to gas fired, due to the apparently harsh environmental regulations put onto the coal plants. This trend makes the entire electricity supply more environmentally friendly, but it is also creating more pressure on the gas supply. While shale gas development solved the puzzle on the gas production side, gas fired generators still rely on the gas pipeline infrastructure and system awareness between gas and electric systems to ensure the gas supply whenever needed. That is especially true in an extreme event like Polar Vortex, when gas demands are extremely high in all sectors. Currently, the total gas consumption from the electric generators is around one third of the total gas consumption in the US, as shown in Fig. 1. With the electric power industry moving towards more gas fired generators, this percentage will keep going up, which means more interdependent gas and the electricity markets and therefore a strong need for studying both systems together. Words by Nan Zhang and Yuan Gao.