deluge

Short definition from Wiktionary

Noun

1. 1
   A great flood or rain.
2. 2
   An overwhelming amount of something; anything that overwhelms or causes great destruction.
3. 3
   A system for flooding or drenching a space, container, or area with water in an emergency to prevent or extinguish a fire.

Verb

1. 1
   To flood with water.
2. 2
   To overwhelm.

Proper noun

1. 1
   The flood taking place in the story of Noah found in the Bible (Genesis) and Qur'an.