The apartment above us got a water leak and water drained into our apartment. Our personal items were damaged by that. Also, landlord told us that we might move to another room.
If those who living in the apartment are responsible for that, will they pay for our personal items and expense for moving?
We don’t have time to take care of it by ourselves, so we are wondering.
We don’t have any renter’s insurance.
Thanks.
Water leak was caused by the apartment above us.

You answered your own question; Renters Insurance, the people renting above you did not cause the leak and the landlord has insurance to cover his / their property. Renters / Tenets need to purchase insurance to cover their / your personal belongings. I know you won’t like my answer but truth is you must participate in your own survival. In this case when you’re a renter / tenet you must have insurance for your personal stuff. Welcome to the world of renting.