I'm sorry to hear of your rain issue though I wish we had the same problem, the rain not the flooding. Aside from the goldenrod and the VCI plugs your best bet is to insure that all your firearm are coated in oil, in this case perhaps more so than normal due to the moisture. Eezox not only serves as a cleaner and protectant but once it dries it effectively blocks moisture better than most gun products though MC3000 or the Moisture Vapor barrier for long term storage bags would most likely be your best bet. Basements can be, depending on locale, a firearm's worst enemy due to the trapped moisture. Hope this helps a bit without having to build an Ark 