Officials say “Day Zero” is imminent in Mexico City. A walk through the city reveals the historical roots of the water crisis, its present-day challenges, and the potential solutions.

This episode was produced by Jesse Alejandro Cottrell, edited by Matt Collette, fact-checked by Laura Bullard with help from Anouck Dussaud, engineered by Patrick Boyd, and hosted by Sean Rameswaram.

Transcript at vox.com/todayexplained

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