Casa roubada, trancas à porta

Meaning: People take precautions only after the damage is done.

Literally: House robbed, then bolts on the door

Example: “Só puseram o semáforo depois do acidente. Casa roubada, trancas à porta.” — They only put up the traffic light after the accident: shutting the stable door after the horse has bolted.

Equivalents in English, French, Spanish, Japanese, German, and 3 more languages

English: Advice comes too late when a thing is done.
French: À chose faite, conseil pris (literally: When a thing is done, advice is taken)
Spanish: A burro muerto, la cebada al rabo (literally: When the donkey is dead, the barley at its tail)
Japanese: 後の祭り (Ato no matsuri) (literally: After the festival (too late to be of use))
German: Rat nach der Tat kommt zu spät (literally: Advice after the deed comes too late)
Italian: Dopo il fatto il consiglio non vale (literally: After the deed, advice is worthless)
Dutch: Als het kalf verdronken is, dempt men de put (literally: When the calf has drowned, they fill in the well)
Russian: После драки кулаками не машут (Posle draki kulakami ne mashut) (literally: You don't swing your fists after the fight)