the heavens open

US /ðə ˈhɛvənz ˈoʊpən/
UK /ðə ˈhɛvənz ˈoʊpən/
"the heavens open" picture
1.

天降大雨, 傾盆大雨

when it suddenly starts to rain very heavily

:
We were just about to start our picnic when suddenly the heavens opened.
我們正要開始野餐,突然天降大雨
I got completely soaked because the heavens opened just as I left the house.
我剛出門就下起了傾盆大雨,所以我全身濕透了。