As recent heavy rains leave over 60,000 affected and claim 20 lives, Sri Lanka confronts the stubborn challenge of relocating flood victims who repeatedly return to high-risk zones despite offers of safer housing.

When the Kelani River swells, families in places such as Kolonnawa pack what they can carry, move to higher ground or relief camps, and wait. After three days, a week or sometimes longer, the water recedes and they go home – not to a new house, but to the same low-lying plot that flooded the year before and the year before that.

This pattern has become routine across Sri Lanka’s flood-prone river basins. Even when the State offers alternative housing or apartments, many residents refuse to leave land that has flooded them repeatedly, sometimes for the third or fourth time in a generation. Officials say the country is running out of easy answers.

The question has taken on fresh urgency. In early August 2026, heavy rains and landslides left more than 60,000 people from over 17,000 families affected across 17 districts, with at least 20 deaths reported. Colombo, Gampaha and Kalutara were among the worst hit. Schools in parts of the Western Province, including Kolonnawa, closed. The Disaster Management Centre recorded thousands seeking temporary shelter while many others stayed with relatives or simply waited it out.

Population Pressure Meets Poor Planning

Part of the explanation is demographic. Sri Lanka’s 2024 census recorded a national population density of around 350 people per square kilometre, up from 230 in 1981. In Colombo District the figure reaches about 3,550 per square kilometre; Gampaha is close behind at roughly 1,775. That pressure has pushed households onto land the State itself regards as hazardous.

In low-lying areas such as Megoda Kolonnawa, where more than 70 per cent of the land sits below sea level, residents have continued to buy and occupy property despite major floods in 2016, 2017 and 2025. A 2021 study found that for lower- and middle-income families, proximity to jobs, markets and transport in the Colombo area consistently outweighs flood risk.

Prime Minister Dr Harini Amarasuriya has been blunt. Speaking after the December 2025 floods, she said people in Colombo District face these risks because of decisions taken without proper planning and driven by political agendas. The government, she added, would no longer allow unauthorised construction in high-risk areas and would provide alternative solutions. A comprehensive flood management plan for the district was promised. Months later, residents say little of it has visibly materialised on the ground.

Who Decides a House is Unsafe

Technical risk assessment for landslides falls largely to the National Building Research Organisation (NBRO). It acts on requests from district or divisional secretaries, inspects sites and issues recommendation reports. Households are ranked Priority 1 (immediate relocation), Priority 2 (high-risk with minor damage) or Priority 3 (unsafe land but no current damage).

Families offered relocation can take a common scheme in which the Government provides subdivided land, or an individual scheme in which they find and buy their own plot or house. In both cases the NBRO must certify the new location is safe. Floods, however, sit outside the NBRO’s remit; those issues go to the irrigation department. The two main drivers of resettlement are therefore handled by separate institutions.

The scale is large. Fourteen districts have been identified as landslide-prone. Originally 10,000–15,000 families were listed as living in unsafe zones. After the late-2024 and 2025 disasters, another 16,270 families were added. Recent NBRO warnings in August 2026 again flagged high-risk areas in districts including Kandy, Kegalle, Matale and Ratnapura as saturated soils raised the threat of fresh landslides.

Livelihoods Over Safety

Why do people stay? Ministry of Public Administration Additional Secretary Roshanie Dissanayake, who chairs a committee amending the Disaster Management Act and has worked on resettlement across 16 districts, says the reasons vary but livelihoods dominate.

In places such as Aranayaka, residents grow high-value crops – durian, vanilla, pepper. A single tree can represent a large share of household income. Moving often means cutting people off from that income. Relocation also severs an entire social package: schools, neighbours, daily routines and a sense of place that is hard to replace.

Financial incentives help. The Government currently offers Rs 5 million to help families buy land and a house elsewhere. In some cases an alternative plot is added. Plantation workers, who traditionally live on estate land they do not own, have gained more flexibility to take the assistance and move. Still, officials cannot force most people to leave. Public cooperation remains essential.

From the irrigation department’s perspective, unauthorised settlement inside flood-control areas worsens the problem for everyone. Settlements built within project zones get inundated and generate the loudest complaints. Reducing the space available for water to spread simply pushes flooding elsewhere. Bunds regulate flow; they do not stop water. When people settle inside those regulated zones, the system breaks down.

Lessons from Past Moves

Sri Lanka’s biggest concentrated relocation effort followed the May 2017 floods and landslides that killed about 203 people and affected nearly half a million. An implementation framework covered Ratnapura, Kalutara, Galle and Matara. Only owners of homes directly or indirectly affected were eligible; those in prohibited zones had to move, while others could rebuild in place.

Academic research shows outcomes depend heavily on how relocation is designed. One project from the 1990s left families with tiny plots and minimal support; many fell into poverty or sold the land illegally. Another, the Lunawa project, offered real choice, a larger grant, proximity to original homes and participation in design. Livelihoods held and people adapted within five years. Successful resettlement, researchers argue, must treat the process as multi-year, protect incomes, ensure transparency and keep affected people as active participants rather than passive recipients.

Legal Limits and Climate Pressure

Most families cannot be legally compelled to leave high-risk communities. Officials can act against illegal occupation of protected land such as forest reserves. But for the majority, the State relies on persuasion and incentives. Climate change is making traditional adaptations – keeping boats at home, waiting out the water – less reliable as weather patterns grow more intense and unpredictable.

In Kolonnawa itself a Rs 10 billion flood-mitigation project was launched earlier in 2026, due for completion by 2029. It includes canal widening, new retention tanks, pumping stations and bridge upgrades. Whether it will persuade residents to stay or finally make the area safer remains to be tested by the next big rain.

A Problem Measured in Decades

Thousands continue returning to flood zones despite repeated evacuations and housing offers. No public progress reports have surfaced on key post-2017 resettlement programmes. Research and field experience agree on one point: relocation succeeds only when livelihoods move with the people.

As another monsoon season tests the country’s defences, the arithmetic of density, the economics of daily survival and the limits of legal compulsion keep colliding. Until safer places also offer work, schools and community, many Sri Lankans will keep choosing the familiar risk over the unknown alternative – and the ritual of leaving and returning will continue.