What's the feng shui saying on the wall after it rains?

The geomantic saying that the wall falls down after rain has no scientific basis. We should look at this problem from a scientific perspective.

geomantic omen refers to the bad influence on social atmosphere, which refers to the situation of residential bases, cemeteries and so on.

Therefore, the geomantic saying that the wall falls down after rain doesn't exist. We should believe in science and don't easily believe and spread things without scientific basis.