Complex sentence: Its riverside location has made it subject to flooding, including a devastating incident on April 4,1977, in which a floodwall built in 1952was overwhelmed and 200 houses were destroyed or damaged.
Split into simpler sentences: Its riverside location has made it subject to flooding, including a devastating incident on April 4,1977. The 1952 floodwall was overwhelmed and 200 houses were destroyed or damaged.