城门失火殃及池鱼的英文：
[Literal Meaning]
city/gate/on fire, bring disaster/to/pool/fish
When the city gate is on fire, disaster is brought to the fish in the moat.

[解释]
无缘无故地遭受灾难。

[Explanation]
to suffer from a calamity without any reasons

[例子]
城门失火，殃及池鱼。导弹击中了目标却也炸死了旁边村庄的几个村民。

[Example]
The missile hit the target but killed a few villagers in the neighboring village. It's really a calamity without any reasons.

To suffer from other’s disaster;to be a scapegoat
城门失火殃及池鱼