I had heard through news reports that your country Indonasia is the one most severely affected by storms, tsunamis, and earthquakes, and your post has given me further insight into this. Your views and level of preparation are excellent; indeed, we need to undertake significant preparations to prevent such events from occurring.
We experience extreme weather quite often, and have even faced a number of disasters in the past.
I hope we are all prepared for the signs and natural conditions that sometimes force us to be ready to face such situations.
Best wishes to you, my friend.