Other Fuel System Hoses Lines/piping, And Fittings problems of the 2017 Honda Ridgeline

My Honda Ridgeline is kept outside all the time. We recently had a several days of rain followed by temperatures dropping into the 20's. When I went to the gas station a couple days ago, I was unable to get the flap that takes the place of a gas cap to push open. It was frozen shut solidly even though there was no sign of water on the outside the weather finally got above freezing today and I manage to break the ice behind the filler flap and got the picture below. At home this was an inconvenience. On a long road trip it could have been a big problem. I presume this also means that every time it rains I'm getting water in the gas tank. I had no idea .