I'm sure the flooding could be a contributing factor, many creatures extend their range when their natural habitat is unusable. Do you get those brown recluse spiders by you too? Those things are nasty.
...What about a hybrid black widow brown recluse spider? AHHHHHHHH.
Also, caulked is not pronounced as "cocked". Otherwise Faulkner would be "Fockner". If anything it's "caukt". But hopefully that will be something that will help keep the bugs out.