Sjoerd van der Wal/Getty Images More exports, and the lingering effects of extreme weather, could affect bills. American households that run on natural gas can expect high bills this winter. How high prices go depends on a lot of factors, including whether the war in Ukraine takes a new turn and if the winter is unusually mild or cold. The Energy Information Agency’s winter forecast expects bills to be higher than last year’s, though not quite as high as the summer peak. War in Ukraine and Europe’s ban on Russian gas have already reshaped global markets.