Thanks for the note.
My layout has all used 027 track. It was stored for 11 months a year in garages and my work shop, only heated and cooled hours it was in use. Rust has not been a problem and rust on the side of tracks looks realist! Usually I would run a piece of fine sand paper over the top of the track taking 5 mins for all before putting the layout down on the floor. My new train room has ac/heat but I keep heat off in winter and set cool at 84degrees except when I am up there. I have had no problem with rust or mold etc yet.
I have a homemade track cleaning car but do not use it much. If the trains slow down I sand or use rubbing alcohol to clean the track. The problem usually is grease or oil from locos.
We are fine here now for us but thousands are hurting, many losing their house, cars and also some jobs. Most did not have flood insurance as they and we were not in a flood zone. We were blessed and not flooded. Over 60,000 lost their houses to the flood. We have been helping friends that flooded muck their houses to dry them out and spray for mold. We are storing some of their lessor damaged furniture in my garage. It will take awhile for most to get houses back as so many have to be repaired.