How do I relax when the threats at work never stop?

The threats really do not stop, so your mind concludes that you can never stop either. But follow that logic and it has no end, because there is no day when the danger is fully gone. If safety means zero risk, you will never feel safe, and you will exhaust yourself chasing a finish line that does not exist. Here is the shift that helps. Your job is not to eliminate every threat, which no one can do. It is to reduce risk to a level you have reasonably managed. Once you have done the work, done it well, the remaining risk is not yours to carry every waking minute. It is the cost of a world that will never be perfectly secure, and that cost is not yours alone to bear. So redraw what safe means. Not nothing can go wrong, but I have done what a careful person can do. When the dread rises, check: is there an action to take right now? If yes, take it. If no, you are just paying interest on a fear you cannot spend down. Do the work, then let yourself rest inside it.