MEXICO CITY — When Reina Cervantes Trejo heard the truck, gears grinding as it climbed the street to her house, she rushed outside. “Thanks to our good Lord!” she said. “The water has finally arrived!

Mexico City, one of the world's most populous cities, could be just months away from running out of water. It’s a crisis brought on by geography, growth and leaky infrastructure, all compounded by the ...

With its expanse of buildings and concrete, Mexico City may not look squishy—but it is. Ever since the Spanish conquistadors drained Lake Texcoco to make way for more urbanization, the land has been ...