Deluge

A washing away; an overflowing of the land by water; an inundation; a flood; specifically, The Deluge, the great flood in the days of Noah (Gen. vii.).

Fig.: Anything which overwhelms, or causes great destruction.

To overflow with water; to inundate; to overwhelm.

To overwhelm, as with a deluge; to cover; to overspread; to overpower; to submerge; to destroy; as, the northern nations deluged the Roman empire with their armies; the land is deluged with woe.

a heavy rain

the rising of a body of water and its overflowing onto normally dry land; "plains fertilized by annual inundations"