In September 1938, during the Sudeten Crisis, when war appeared imminent, the Bakerloo and Northern line tunnels at Embankment were temporarily sealed with concrete to protect against flooding through bombing.
I løbet af Sudeterkrisen i september 1938, hvor krigen føltes nært forekommende, blev Bakerloo og Northern line-tunnellerne ved Embankment midlertidigt forseglet med beton for at beskytte mod oversvømmelse ved bombning.