the rain comes down in a deluge
Heavy rain, Chinese idiom, Pinyin D à y à P à ngtu ó, means to describe the heavy rain. From the romance of the Three Kingdoms.
Idiom explanation
Torrential: it's raining heavily. It's raining hard.
The origin of Idioms
The 28th chapter of romance of the Three Kingdoms written by Luo Guanzhong in Ming Dynasty: "after several days, it suddenly rained heavily."
Discrimination of words
Rain is pouring down
the rain comes down in a deluge
a thing turns into its opposite if pushed too far - jí zé bì fǎn
grow old with nothing accomplished - mǎ chǐ tú zēng