In times of worries and uncertainty in the world, how do you react? When your mind and body is telling you that now it is really time to fight or flight. How can you try to stay calm in a crisis? And why should you?
First, a mind in this crisis mode is not thinking clearly. The sense of urgency will make you take decisions and do things that are not as rational and well thought of, as if you keep calm.
It is the same mechanism as the sales person is using when they say “limited time offer”, “special deals”, but ONLY if you hurry up!! By making you think that this is really urgent, otherwise you will miss out on an opportunity, so there is not that much time for you to think, and think clearly. Do you really want or need what they are offering? But, before you know it, you have accepted the offer, in fear of missing out of something good! And afterwards, you wonder why you did that.
So when in a crisis, if you are able to stay calm and take control of yourself, you will keep your ability to think clearly and make good decisions.
I find it very helpful to breathe. Find that focus on the breath and concentrate on that and nothing else for as long as I can. Like a silent meditation. And it always helps. At first, the mind can wander, thoughts about this and that, but usually it gets more silent after a while, and I find my calmness again.

As always, I wish you the best. Take Care and try to Stay Calm.
Namaste.