I have a Liberty gun safe. For several years now I've tried one of those mini-dehumidifiers that you plug in the wall to dry out. Blue for dry, pink for saturated. Darn thing turns pink in a couple of days inside the cabinet. It's always been that way, not just since the "month of rain". San Antonio area is more humid than Dallas. The rifles and pistols always look and function just fine.
Do I even need to hassle with this? My dad kept rifles in the corner of a closet, or in a plain cabinet in the living room and there wasn't a spot of rust on any of them.
On the plus side recently - the humidity in my cigar humidor is perfect.
...and have dominion over the fish of the sea, and over the fowl of the air, and over every living thing that moveth upon the earth. Gen. 1:28