This study aims to investigate the possible congestion in the German natural gas system. which may arise due to an increase in the gas consumption in the power sector in extreme weather events. For this purpose. we develop a two-stage approach to couple an electricity model and a natural gas network model. https://www.aitsglobal.com/product-category/%d7%99%d7%9c%d7%93%d7%99%d7%9d/