Our River Murray is the longest river in Australia, three quarters of it flows through South Australia , though we haven't had a serious flood since 1956 ,the other ones have inundated a lot of holiday shacks with 3 or more feet of water owing to the level of land it flows through.
Elevated homes and shacks have been built in the low lying areas , some have gambled on the lower level not being flooded by making by putting living areas there, most have left the area clear using it for parking , bbq areas etc
THE largest one is a permanent dwelling the others are what we call shacks.
https://mybloggers.com/ghost/upload/small/2014/09/02/5406a5782e800.jpg