Cities flood faster now because they’re built to move water, not absorb it!

16 Feb 2026 · 1 min

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In this monologue, Dan Novaes explains that contemporary urban flooding is driven less by extreme rainfall and more by how cities are designed. He argues that extensive use of concrete, asphalt, and rooftops creates impermeable surfaces that prevent water from soaking into the ground, causing rain to run off rapidly. As cities expand, they lose soil and trees, further reducing natural water absorption. This rapid runoff hits drainage systems as a sudden wave, overwhelming them and leading to swift, widespread flooding that quickly fills basements, closes roads, and hampers emergency services. Novaes emphasizes that the speed of water movement and limited drainage capacity, rather than just rainfall intensity, are the primary reasons floods are becoming more common in modern cities.

Chapters

Why do cities flood more now? Even when it doesn't feel like the rain is extreme, streets turn into rivers, drains overflow, and traffic stops instantly because cities aren't built to absorb water. Concrete, asphalt and rooftops don't soak anything in, so rain doesn't go into the ground. It rushes across the surface all at once. And as cities grow, there's less soil and fewer trees. So the water has nowhere to slow down. It hits the drainage system like a sudden wave. The problem isn't only rainfall. It's speed, how fast the water moves and how limited the system is. And once water starts rising, it spreads quickly. Basements fill, roads close, and emergency services slow down. Even small floods can turn into huge disruption in minutes. That's why floods are becoming more common, not just because of weather, but because modern cities trade natural absorption for development. And when the water comes, the city can't breathe.