Aguas

What It Actually Means

Aguas — literally “waters!” — is Mexico’s universal warning cry: “watch out!”, “heads up!”, “careful!”. It covers physical danger (a step, a car, a low doorway) and figurative danger (a shady deal, a moody boss). The classic origin story goes back to colonial times, when households emptied used water out of windows and shouted “¡aguas!” so people below could dodge. The wastewater is gone; the shout stayed.

Common Constructions

• ¡Aguas! on its own — an instant alert when something is about to hit someone.
• Aguas con + the hazard — “watch out for”: “Aguas con el perro, muerde.”
• Echar aguas — to keep lookout or spot someone: “Échame aguas mientras me meto en reversa.”

Where Textbooks Get It Wrong

Textbooks teach ¡cuidado!, which every Mexican understands — but in the street, the word that actually flies out of people’s mouths is aguas. Cuidado can sound a touch formal or parental; aguas is what friends, taxi drivers, and market vendors shout in real time.

Common Pitfall

Don’t confuse it with asking for water — the plural form plus the urgent tone make the warning unmistakable. And while aguas is informal, it’s never rude: you can yell it at a total stranger about to step into traffic, and they’ll thank you for it.