If it's not fire, it's snow. Reddit has a video from Beta of them shoveling the snow off the roof in Montana. Kind of figured Axl would like the mountains and be out there playing in the snow.
In Yellowstone, they use rope to clear off the snow from the roofs. Comes off pretty quick. Not exactly sure how it's done but here's a video. https://www.youtube.com/watch?v=Ugb5fyaVZx0 Maybe they tired it.