Rain moves differently across concrete and healthy soil. A hard surface sends water quickly towards a drain. Soil has roots and small spaces that can absorb and hold part of the rain. This can reduce fast runoff and leave water for plants after the storm.
Soil loses this ability when heavy machines press it tightly or pollution harms living organisms. A city can protect open soil during building work and add suitable organic material. Planted areas can work with a drainage system. Healthy soil helps with rain, but it cannot replace safe drains during an extreme storm. Healthy soil is part of a city’s rainwater system. Protecting soil before it is sealed or compacted is often easier than restoring it later.