[IndyTiger]

...if the pumps still worked.

If electricity is out for days or weeks, all that standing water and sewage...disease certain to follow.

[MizSterious]

Disease--yes. And since a lot of the dead are buried above ground, there will be a good number of coffins/corpses washing up in odd places. This happened with hurricane Betsy. (Even those buried beneath the ground may well surface.)