When a disaster strikes and your house is destroyed, it is dangerous for you to stay inside.
In such cases, go to a "shelter."
The following video is an example of Katsushika Ward, Tokyo, and gives you an idea of what evacuation shelters are like.
https://www.youtube.com/watch?v=u7g4ysWgYVg&t=98s
<What you can do at an evacuation shelter>
You can stay in a shelter until you find a safe place to live.
You can get food, drinks and information.
The video is in Japanese only, but you can learn about the evacuation shelter, rules, and etiquette just by watching it.
Knowing the situation at evacuation shelters in advance will be extremely useful when a disaster occurs.
Please see it.