You should keep your backyard safe as possible no matter what time of year it is, but understandably things will have to change depending on the season and the temperature. So rather than waiting to see what happens, you should always try and stay one step ahead of the game so that you aren't left with repairs and last minute changes to be made once it's too late. As this will not only cost you a lot of time that you don't have, but a lot of money too. It's almost Christmas, so you can't afford to be cashing out any more than you already have to.
Here are some things that you should keep in mind for the sake of your backyard.
You most likely have a lot of leaves and foliage scattered around your backyard as winds tend to pick up while more plants are dying as they come out of season. While it can look rather pretty during the Autumn, once the winter comes in, all you're left with is a brown cold sludge that sticks to your pavement and grass over time. So clean things up before it gets to this stage. If you already have a compost, then this will be even easier for you to do as you can just dump everything inside and watch it steam while it decomposes. Remember to trim back any hedges and bushes too so that you aren't left with an overgrown forest.
Fences are essential for gardens all year round, as they not only keep out whoever and whatever isn't welcome, but they also protect areas that are off limits or can be dangerous to young children or animals, like a swimming pool, for example. You can do this with a diy fence that can be custom made depending on the space you want to protect. Aluminium is a brilliant material because unlike wood, it cannot rot and isn't sensitive to what the weather is doing. Not only that but it's a lot more durable, meaning it can't be broken through or knocked down, making it an extremely reliable form of protection.
If you have anything of value in your backyard, then make sure that you take it out of view and find a new home for it. The best thing is to bring things indoors and keep them safe in your garage for now. Not only does that mean you don't have to worry about things getting stolen, but you also don't have to worry about them being damaged by the cold weather. A lot of tools can break due to the cold and ice so don't risk it by keeping them outdoors. The same rules apply to any fragile plants. Transition them into a pot and bring them indoors for now.
Now that you see what things you need to think about, there is no reason that you should have any disasters in your backyard during the winter.