You must show relevance. Simple posting of data is meaningless. You must be able to show that these people can never live for a few weeks, or a month more/whatever w/o dying. You must show cause and effect, not imply it. Everything you posted refers to things that exist w/o the flood being present. There's more water outside the flood area, than in it.
Disease vectors, toxic waters ... With all this around you'd think the scare mongers could show lots of sick people. Alas, the claims are empty and those folks aren't as dumb and incompetent as they're made out to be.