OK a bit Heath Robinson I know but...
A friend of mine up North told me the other week that his daughter and S-in Law were flooded near Donny.
Seems the "grief" came in via the lavatory, out of that, then in under the doors.
Now I know it may sound a bit daft.. I wonder if it wouldn't be a good idea if people in flood prone areas were to have some sort of bung device to block the sewage out pipe and then if they could seal or with battens screw shut the doors etc so that this would stop flood water coming in for the greater extent.
Course that sounds mad but wouldn't it then be best if you deliberately flood inside of your house so that there was a bit more water in and this could equalise the pressure from the outside so that when it all goes down perhaps there won't be so much of the stinking stuff in your house so possibly less trouble all around?
Mad or sad or what?...