In some graveyards, they raise the grave to three cubits in anticipation of rain falling; what is the ruling on that?

Question:
Honorable Shaykh, may Allah grant you success. He says: In some graveyards, they bury the dead and raise the grave to between two and three cubits, or more. When I asked some of them about the reason for that, they said: We are preparing for the possibility of rain falling in the future, and that the grave might sink. Is their action correct?

Answer:
No, guide them and explain to them that a grave is not to be raised more than one cubit; the grave is not to be raised more than one cubit, and nothing is to be added to that.