Flood Risk Overview
Illustrative flood potential by district. This is an awareness tool — it does not predict actual flooding.
Heavy rain: Intense short-duration rain such as afternoon thunderstorms. Low-lying streets and underpasses may briefly pond.
All districts — Heavy rain
Why Xinyi?
Mostly flat basin floor bordered by hills to the south-east.
- Hillside runoff toward lower streets
- Dense paved surfaces
- Modern drainage in newer blocks
What drives flood potential
Rainfall
Intensity and duration — short bursts and long typhoon rain behave differently.
Topography
Water flows to low points: basins, underpasses, riverside areas.
Drainage
Pipe and pumping capacity; blocked drains cause local ponding.
Local conditions
River levels, tides, paved surfaces and soil saturation.
Official flood datasets
Real flood potential maps and observations come from these sources.