As wet as a drowned rat.

倾盆大雨过后，他像落汤鸡似的。

After the storm she looked like a drowned rat.

暴雨过后，她浑身湿透，像只落汤鸡。

She came in from the storm looking like a drowned rat.

她冒着暴雨来,淋得像落汤鸡.

It rained cats and dogs and, look, I am wet as a drowned rat.

雨下得好大呀，看呀，我变成落汤鸡了。

I had to cycle home in the rain and came in looking like a drowned rat.

我不得不在雨里骑车回家,进门的时候看起来像落汤鸡.