'Rivers' or 'floods' signify temptations. 'Rivers' signify truths in abundance serving the rational self, and so, the understanding, for the purpose of doctrine and life.

In Isaiah 43:2, 'rivers' and 'waters' signify difficulties and falsities.

(Referencat: Apocalypse Revealed 683)

In Isaiah 40:12 'to weigh the mountains in a balance, and the hills in scales,' signifies that the celestial aspects of love and charity are from the Lord, and that He alone disposes their states.

(Referencat: Arcana Coelestia 3101)