＃It has been so humid in Fukuoka. I am always *sweating buckets.

＃福岡は湿度がすごいね。ずっとバケツくらい汗かいてるよ。

*Sweating buckets is an expression that means you are so hot and uncomfortable that your sweat can fill up buckets. Although we don't actually sweat this much, it allows us to express on an exaggerated level how hot we are.

*バケツくらい汗かいてるよ は一つの表現として、すごく暑くてバケツがいっぱいになるくらい汗をかいている様子。実際はそんなに汗はかかないけど、どのくらい暑いかという事を大げさに表現しています！