Resilience is easy to claim and hard to demonstrate. Cities often describe themselves as resilient in plans and strategies. Whether they are is tested when something goes wrong — a flood, a heatwave, an earthquake, an epidemic, or a slower stress like drought or housing shortage. UN-Habitat describes resilience as the capacity of a city to absorb shocks and continue to function, and the emphasis on capacity is important: resilience is a property of systems, not a slogan.
Resilience is tested, not declared
A city’s resilience is revealed by how it performs under stress, not by the language in its strategy. The relevant questions are concrete: when the flood came, who was evacuated and who was left? When the heatwave struck, did the elderly survive? When the pandemic hit, did services reach informal settlements? Plans are useful preparation, and the evidence of resilience is in outcomes during and after a shock, which is why post-event reviews are more informative than pre-event claims.
The most exposed are usually the least protected
Disasters do not affect a city evenly. Informal settlements on floodplains or steep slopes, housing without air conditioning, workers who cannot afford to stay home — these are the places and people that absorb the most harm. Resilience that protects only the formal, well-served parts of a city leaves the majority exposed. This makes equity a core dimension of resilience, not a separate concern: a city that ignores its informal areas is fragile precisely where the risk concentrates.
Infrastructure and its limits
Engineered defences — sea walls, drainage, reinforced buildings — are necessary and can create a false sense of security. A levee can encourage development in a floodplain, increasing the consequences if it fails. Infrastructure also has maintenance costs that are easy to defer until it fails. Resilience therefore depends as much on maintenance, regulation and land-use planning as on construction. The strongest wall is undermined by a city that builds behind it without managing risk.
Heat, the quiet killer
Heatwaves kill more people in many cities than floods or storms, and the deaths are often invisible, occurring at home among the elderly and isolated. Heat interacts with urban design: dense concrete, little shade and no green space raise temperatures in the poorest neighbourhoods. Responses include early-warning systems, cooling centres, tree planting and building standards. These are inexpensive relative to their effect, and they are often neglected because heat does not produce dramatic images.
Governance and coordination
Disasters cut across departments: water, transport, health, housing, emergency services. Resilience requires coordination before the event, when incentives to cooperate are weak. A city that has practised joint responses, clarified who decides and built trust between agencies will perform better than one that meets its counterparts for the first time in a crisis. This is unglamorous organisational work, and it is often the difference between a managed event and a catastrophe.
Community and social networks
In the first hours of a disaster, neighbours and local groups are often the first responders. Strong community networks, local knowledge and mutual aid can save lives before formal services arrive. Resilience strategies that treat residents only as victims miss this capacity. Engaging communities in planning, supporting local organisations and using their knowledge of the area improves both preparation and response.
Slow stresses and the long term
Not all shocks are sudden. Housing unaffordability, water scarcity, declining infrastructure and creeping heat accumulate over years. Slow stresses erode the capacity to handle the sudden ones, so a city that has let its systems degrade is more fragile when a crisis arrives. Resilience planning has to address both the dramatic and the gradual, and the gradual is harder to prioritise because it produces no single moment of crisis to galvanise action.
How to tell if a city is actually resilient
Ask what happened in the last event and who was worst affected. Ask whether the infrastructure is maintained and the land-use rules enforced. Ask whether agencies practise together and whether communities are involved. Ask how the city is preparing for heat, drought and slow stresses, not only for the dramatic ones. The answers are more revealing than any resilience label, because they describe capacity rather than aspiration.
Finance and the investment gap
Resilience requires investment, and the investment is hard to justify because its returns are the disasters that did not happen. Budgets reward visible projects, and maintenance and preparedness are easy to defer. Cities also often lack the revenue and borrowing capacity to fund large works, particularly in lower-income countries. Closing the gap requires predictable finance, national support for local authorities, and a way of valuing avoided losses so that prevention competes with construction for scarce funds. Without that, resilience remains a strategy on paper.
Further reading
- UN-Habitat. City Resilience and urban programmes. unhabitat.org
- UNDRR. Making Cities Resilient. undrr.org
Image: Petar Milošević · CC BY-SA 4.0 · via Wikimedia Commons.