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THE recent floods in Inanam, Menggatal and Sepanggar have reminded us how quickly heavy rainfall can disrupt everyday life. Homes and businesses were affected, vehicles became stranded, and many families faced the difficult task of cleaning up and repairing their properties.
For affected residents, flooding is not simply about rising water. It can mean damaged furniture, lost income, unexpected expenses and considerable inconvenience.
These experiences remind us of an important question. That is how we can make our communities safer and better prepared for future floods?While we cannot control the weather, modern engineering, improved planning, early warning technology and cooperation among government agencies and communities can help reduce flood risks.
Global warming has become an increasingly important consideration in flood management worldwide. As temperatures rise, warmer air can hold more moisture, potentially contributing to heavier rainfall under suitable weather conditions.
However, flooding is also influenced by local thunderstorms, monsoon patterns, surrounding hills, rivers and drainage conditions.
The Northeast Monsoon generally occurs from November to March, ringing another period when rainfall preparedness is particularly important. These seasonal weather patterns remind us that flood preparedness should be a continuous effort.
We used to ask this question: “Why Do Flash Floods Happen?”Imagine heavy rain falling on a forest. Trees, vegetation and soil help absorb rainwater and slow its movement towards nearby streams.
Now imagine the same rainfall falling on a developed town with roads, buildings, car parks and concrete surfaces.
Because less rainwater can soak into the ground, more water flows rapidly towards drains and rivers. When large amounts of rainwater enter these waterways within a short period, flooding may occur.
Other natural and physical factors, including river levels, sediment accumulation, drainage obstructions and tidal conditions, may also influence how quickly water can flow away. For example, heavy rainfall occurring together with high river or tidal levels may slow down the discharge of stormwater.
This explains why flood management requires an understanding of the entire drainage system, from upstream catchments to downstream rivers and coastal outlets.
One of the most valuable developments in modern flood management is the Flood Forecasting and Early Warning System. Think of it as an intelligent system that helps predict where flooding may occur before floodwater reaches vulnerable communities.
By combining rainfall monitoring stations, river-level sensors, weather radar and computer models, engineers can estimate how rainwater may affect rivers and surrounding areas. When monitoring information indicates a possible flood, early warnings can help authorities and residents prepare.
Imagine receiving a reliable warning 30 minutes before floodwater reaches your neighbourhood. That additional time could allow families to move their vehicles, safeguard important documents, protect valuable belongings and prepare to evacuate safely when necessary. For emergency response teams, timely information can also support better coordination and assistance.
Building upon existing flood monitoring and warning initiatives, Sabah can progressively strengthen its forecasting capabilities through improved technology, wider monitoring coverage and greater information sharing among relevant agencies.
The objective is simple. That is the earlier communities receive reliable information, the better prepared they can be.
We already have an important engineering reference known as the Urban Stormwater Management Manual for Malaysia, commonly called MSMA, developed by the Department of Irrigation and Drainage (JPS). MSMA promotes an integrated and sustainable approach to managing rainwater, particularly in developing urban areas.
Instead of depending entirely on larger drains, it encourages rainwater to be managed closer to where it falls.
For example, detention ponds and on-site detention facilities can temporarily store excess rainwater during heavy storms and release it gradually afterwards.
Green spaces, rain gardens and suitable permeable surfaces can also help slow down rainwater runoff. Rainwater harvesting systems provide additional benefits by collecting water for appropriate uses.
Another important principle is to consider the entire drainage catchment rather than individual drains alone.
A catchment is simply an area where rainwater flows towards a common stream, river or drainage outlet. When planning drainage improvements, engineers must consider how water travels through the whole system, including the conditions further downstream.
In simple terms, good stormwater management means managing rainwater throughout its journey, from where it falls until it safely reaches a river or the sea.
Five practical ways to strengthen Sabah’s flood resilience and to further support the ongoing flood management efforts.
First, strengthen flood forecasting and early warning systems. Wider use of real-time rainfall and river-level monitoring can provide valuable information for flood preparedness.
Second, continue improving drainage infrastructure. Engineering assessments can help identify suitable opportunities to enhance drains, culverts, waterways and flood mitigation facilities.
Third, support regular drainage maintenance. Routine inspection, cleaning and sediment management help drainage systems operate effectively.
Fourth, encourage MSMA-based stormwater planning. New developments can incorporate suitable detention facilities, green spaces and sustainable drainage solutions.
Fifth, promote community awareness and preparedness. Residents and businesses can help by keeping drainage outlets clear, following official weather warnings and preparing simple household emergency plans.
These measures can complement the ongoing efforts of JPS, JKR, local authorities, emergency response agencies and other stakeholders. Close cooperation among government agencies, engineers, developers, businesses and communities will remain essential.
Flood management is not simply about building bigger drains or higher riverbanks.
It involves a combination of sound engineering, responsible development, reliable forecasting, effective maintenance and community preparedness.
As Sabah progresses under the Sabah Maju Jaya (SMJ) 2.0 development agenda, climate resilience and sustainable infrastructure can play an increasingly important role in supporting economic growth, investment confidence and improved quality of life.
The recent floods also provide valuable experiences from which engineers, government agencies and communities can learn together. Through continued cooperation, technical innovation and forward-looking planning, Sabah can progressively strengthen its ability to manage future flood risks.
Ultimately, flood resilience is a shared responsibility. Government agencies provide leadership and essential infrastructure, engineers contribute professional knowledge and innovative solutions, while communities play an important role in preparedness.
We cannot stop the rain, but through smarter engineering, earlier warnings, better planning and collective effort, we can build a safer, stronger and more flood-resilient Sabah for future generations.