expression
clear as day; patently obvious
Idiomatic expression emphasizing that something is extremely obvious, often used for negative situations or consequences. The literal image is 'clearer than watching a fire'.
See also: 火を見るより明らか
彼が嘘をついているのは火を見るよりも明らかだ。
It's as clear as day that he is lying.
このままでは失敗するのは火を見るよりも明らかだった。
It was patently obvious that things would fail if they continued like this.