June 29, 1935: The line was seriously damaged by the great flood of the Kamo-gawa River, which washed away the roadbed and destroyed the platforms between the Sanjo and Shichijo stations (following this experience, the Kamogawa Extension Project was formulated to take the Keihan Main Line underground).
1935年（昭和10年）6月29日鴨川大水害、三条～七条間で路盤流失・プラットホームの倒壊などの大きな被害を受ける（これを契機に京阪本線を地下化する鴨川拡幅計画が策定される）。