As the print's inset in the right panel explains (see below), the flooding was the worst in fifty years. The embankment of the Nakagawa collapsed and the entire area of Mukojima became a lake that could only be navigated by boat. Officials and police officers rescued people and did what they can to mitigate the disaster. 

Only the left and right sheets of this triptych are part of this collection and the left sheet of this collection's print has the information in the publisher's seal blacked out. (Although most of the information in it can be made out after image enhancement as shown in the Print Details below.) It is unknown why the blacking out was done and I have seen this on other copies of this print.

The scene depicted in this print includes the area around the Mimeguri Shrine along the Sumida River, whose torii is pictured at the top of the center and right sheets of the print.

During the Meiji Era up until the 1896 flooding, major flooding occurred in the Tokyo area in 1870, 1878, 1885, 1887, 1889, 1890 and 1892.¹ This flooding, particularly the 1893 and 1896 floods, led to the passing of the first River Law in 1896, which "brought centralization in river control." "The River Law assigned the central government as the responsible party for flood control measures that demanded large funds..." leaving the local government "responsible for ordinary flood management."²

Despite these and subsequent efforts there are major low-lying areas of Tokyo that remain extremely vulnerable to floods, as reported by The Japan Times on July 5, 2019:

² Urban Water in Japan, ed. Rutger de Graff, Fransje Hooimeije, Routledge, 2008, p. 97.

³ The Japan Times https://www.japantimes.co.jp/news/2019/07/05/national/one-year-deadly-flooding-western-japan-disaster-resonates-vulnerable-areas-tokyo/#.XrN2tahKiUk