Climate Change and Where to Live: Which Cities Will Still Be Liveable in 2040?

Climate change is no longer a 2050 problem. It is a 2026 problem that is already reshaping where people can comfortably live, work, and raise families. If you are a professional in Lagos, Cairo, Karachi, Manila, or Mumbai, you are not reading about climate change in the abstract — you are living it. The 47°C heat waves. The flooding that paralyses entire cities for days. The water rationing. The air quality that keeps children indoors for weeks at a time.

But here is what most climate coverage misses: the impact is not distributed evenly. Some cities are becoming dramatically less liveable, while others — often in the same countries building the strongest economies and running the most active immigration programmes — are among the most climate-resilient places on Earth.

This article draws on the IPCC Sixth Assessment Report, the World Bank Climate Change Knowledge Portal, the Notre Dame Global Adaptation Initiative (ND-GAIN) index, and city-level climate risk assessments to map out where livability is heading through 2040. The picture is sobering, but it is also actionable. If you are already weighing a move, it belongs alongside the practical questions covered in The True Cost of Migrating Abroad — because climate is now one of the costs, whether or not it appears on any budget spreadsheet.

The Climate Livability Index: How Cities Are Ranked

Climate livability depends on several interconnected factors. No single metric tells the whole story, but the combination of these five dimensions gives a reliable picture of long-term habitability.

Climate Livability Dimensions

The final dimension — infrastructure resilience — is the one most people underestimate. Two cities can face an almost identical rise in temperature, yet feel entirely different to live in, because one has the money and institutions to adapt and the other does not. Keep that distinction in mind as the numbers get worse below; the raw physics matters, but the wealth to blunt it matters just as much.

The Cities Facing the Steepest Decline

Let us start with the difficult data. Several major cities in developing countries are on trajectories that make long-term livability increasingly challenging.

Heat Stress Projections for Major Cities (2026 vs. 2040)

The wet-bulb temperature column is the most alarming figure in this entire article. A wet-bulb temperature of 35°C is the threshold beyond which the human body cannot cool itself through sweating — prolonged exposure becomes fatal regardless of fitness level, hydration, or access to shade. It is not "very uncomfortable"; it is a physiological ceiling. Manila is projected to experience 22 to 30 such days per year by 2040. Mumbai faces 18 to 25. Dhaka could see up to 32.

These are not worst-case scenarios. They are middle-of-the-road projections under the IPCC's SSP2-4.5 pathway — a scenario in which global emissions decline somewhat but not dramatically, and roughly where current policy commitments point as of 2026. The high-emissions pathway (SSP5-8.5) is considerably worse; these figures assume the world does moderately well, not badly.

Flood Risk for Major Cities

Lagos is sinking. The city sits on a lagoon system with significant portions at or below sea level, and land subsidence from groundwater extraction is accelerating that decline. By 2040, the World Bank projects annual flood damages could roughly triple to $12.5 billion — costs that fall disproportionately on middle-class neighbourhoods that lack the drainage infrastructure of wealthier islands like Ikoyi and Banana Island. The devastating 2024 and 2025 flood seasons across Nigeria, which displaced hundreds of thousands, were a preview rather than an anomaly.

Manila faces a compound threat: intensifying typhoons stacked on top of sea-level rise. The Philippines already absorbs around 20 tropical cyclones per year, and climate models project these storms will grow more intense even where their frequency holds steady — more rain, higher storm surge, longer recovery windows. For a first-hand account of what leaving looks like from this region, see A Philippine Nurse Abroad: A Real Story.

Water Scarcity: The Slow Crisis

The United Nations defines water stress as below 1,700 m³ per person per year, scarcity as below 1,000 m³, and absolute scarcity as below 500 m³. Cairo is already deep in absolute-scarcity territory, kept afloat almost entirely by the Nile — a river whose flow is contested upstream by the Grand Ethiopian Renaissance Dam. By 2040, Karachi and Delhi are both projected to cross the scarcity threshold. For context, the average Canadian has access to roughly 80,000 m³ of renewable freshwater per year — more than 200 times what a Cairo resident is projected to have in 2040. This is the crisis that arrives quietly, through pressure drops, rationing schedules, and the slow salinisation of coastal aquifers, rather than through a single dramatic event.

The Cities That Will Remain Liveable

Now for the other side. Several cities in developed countries — many of which are also the strongest economic centres — are projected to remain highly liveable through 2040 and beyond.

Climate Resilience Scores: Top 20 Liveable Cities for 2040

*Dubai's water-security rating reflects vast desalination infrastructure rather than any natural endowment. The UAE spends roughly $4 billion a year on desalination, effectively engineering its way around a near-total absence of natural freshwater. That resilience is real but purchased, and it depends on continued energy and capital — a point worth remembering before treating Dubai as a like-for-like climate haven.

Canada dominates this list with five cities in the top 15, and it is not a coincidence. Canada holds around 20% of the world's surface freshwater, sits at a northern latitude that moderates the worst heat outcomes, and has been investing steadily in climate-resilient urban infrastructure. Calgary and Vancouver already rank among the world's most liveable cities on broader indices, and their climate trajectories suggest that holds through 2040 and well beyond. If Canada is on your shortlist, the mechanics of getting there are covered in Canada Express Entry: A Guide for People from Developing Countries and the practical landing steps in the Canada arrival guide.

Australia contributes five cities despite being a continent famous for extreme heat and drought. The explanation, again, is infrastructure: Australian cities have invested heavily in water recycling, desalination, bushfire management, and heat-resilient urban design. Melbourne's water grid, for example, includes a large-scale desalination plant capable of supplying a substantial share of the city's needs independent of rainfall — a hedge built after the Millennium Drought that cities elsewhere are only now scrambling to copy.

New Zealand is the quiet standout. Auckland, Wellington, and Christchurch are projected to experience minimal heat stress, enjoy excellent water security, and face only moderate flooding risk. New Zealand's geographic isolation and temperate maritime climate make it one of the most climate-resilient countries on Earth — though that same isolation, and a deliberately selective immigration system, make it one of the harder destinations to reach.

The Direct Comparison: Source Cities vs. Destination Cities

This is where the data becomes personally relevant. If you are living in one of the source cities and considering a move to one of the destination cities, here is what the climate-trajectory comparison actually looks like.

Lagos vs. Toronto: Climate Comparison Through 2040

Cairo vs. Melbourne: Climate Comparison Through 2040

Manila vs. Auckland: Climate Comparison Through 2040

Karachi vs. Calgary: Climate Comparison Through 2040

The adaptation-spending line is the one to sit with. Calgary spends around $410 per resident per year on climate adaptation — storm drainage, flood barriers, heat-resilient buildings, emergency services. Karachi spends about $5. Even where two cities face similar temperature increases, the one spending 80 times more on adaptation will feel like a different planet to live in. Air conditioning that never loses power, tap water you never think twice about, roads that drain instead of flood: these are not luxuries, they are what adaptation spending buys, and they compound quietly across every ordinary day.

The Health Dimension: What Climate Does to Your Family

Climate change is not only an infrastructure problem — it is a health crisis with deeply unequal distribution.

Climate-Related Health Impacts by City (2025)

Karachi loses over 3,200 people to heat-related causes every year — a figure projected to reach roughly 5,500 by 2040 as wet-bulb days multiply. Mumbai loses more than 4,100. Meanwhile, the child asthma rate in Karachi sits at 21.3%, driven largely by air quality, against 7.4% in Calgary.

For parents, these are not abstract statistics. They are the daily arithmetic of whether the children can play outside this week, whether the water needs boiling before it is safe, and whether the air they breathe on the walk to school is quietly scarring their lungs. It is one of the least-discussed but most decisive factors in why families leave — a theme explored further in Raising Children Abroad: Africa vs. Europe.

The Economic Cost of Living in Climate-Vulnerable Cities

Climate change carries a direct financial cost that erodes professional earnings, even for well-paid workers.

Annual Climate-Related Costs for a Middle-Class Family of Four

A middle-class family in Lagos pays an invisible "climate tax" of roughly $8,660 a year — generator fuel, water purification, air-quality management, and lost productivity during extreme heat. The same family in Auckland pays about $280. That $8,380 annual gap compounds into roughly $83,800 over a decade — money that could otherwise have gone into education, savings, or an asset that builds wealth rather than merely holding disaster at bay. Seen this way, the climate tax is a close cousin of the hidden tax of infrastructure failures: both quietly transfer income from households to coping mechanisms that produce nothing.

What the Projections Mean for Long-Term Planning

Climate trajectories are not reversible on human planning timescales. Even under the most optimistic emissions scenarios, the warming already locked into the system means Karachi, Lagos, and Manila will be meaningfully hotter, more flood-prone, and more water-stressed in 2040 than they are today. The open question is not whether these changes arrive, but how severe they become.

Climate Livability Trajectory: 2026 to 2050

The divergence is stark. By 2050, Calgary's livability score is projected at 8.7 — virtually unchanged from today. Karachi's is projected to fall to 2.6, making ordinary daily life a constant negotiation with heat, water scarcity, and flooding.

For professionals making 10-to-20-year career and family plans, these trajectories matter enormously. Where you live is no longer only a lifestyle choice — it is increasingly an economic, health, and safety decision that compounds across decades.

How to Factor Climate Into a Migration Decision

Climate should sit alongside the usual migration criteria, not replace them. A practical way to weigh it:

• Match the timeline to the trajectory. If you are planning a permanent move, look at the 2040 and 2050 columns, not just today's weather. A city that is merely uncomfortable now but on a steep decline is a worse bet than one that is warm but stable.
• Weight adaptation capacity, not just temperature. A wealthy city that warms feels far better than a poor city that warms by the same amount. Adaptation spending per capita is a rough but honest proxy.
• Check water before heat. Heat is visible and gets the headlines; water scarcity is slower, harder to escape, and structurally harder to fix. Cairo's core constraint is water, not temperature.
• Do not over-index on any single city. Climate resilience is largely a national trait — freshwater endowment, latitude, institutions, adaptation budgets. Choosing a resilient country usually gives you several liveable-city options rather than one.
• Treat immigration access as part of the equation. The most climate-resilient destinations — Canada, Australia, New Zealand — also run selective, points-based systems. Climate resilience without a realistic visa pathway is not a plan.

The cities built for the 20th century's climate are not necessarily the cities that will thrive in the 21st century's. And the data reveals an uncomfortable convergence: many of the world's most climate-resilient cities are in the same countries with the strongest economies, the best healthcare systems, and the most active skilled-migration programmes. That overlap is not accidental. The institutional capacity that funds climate resilience is the same capacity that builds economic opportunity.

Frequently Asked Questions

Is any major city genuinely "climate-proof" through 2040?

No city is climate-proof — every location on the top-20 list shows some decline in its livability score by 2050. The difference is one of degree and, crucially, of adaptive capacity. Cities like Calgary, Auckland, and Vancouver are projected to decline only slightly from an already high base, and they have the wealth and institutions to manage the change. "Resilient" is a more honest word than "safe".

Should I choose a destination based on climate alone?

No. Climate is one factor among several — visa eligibility, job market, cost of living, community, and healthcare all matter. The strongest approach is to shortlist countries that score well across multiple dimensions, then use climate resilience as a tie-breaker or a long-term stress test. A climate haven you cannot legally move to, or cannot find work in, is not a viable option.

How reliable are 2040 climate projections?

The direction of travel — hotter, more flood-prone, more water-stressed in the vulnerable cities listed here — is very well established and not seriously disputed. The precise numbers carry uncertainty and shift with the emissions pathway the world actually follows. Treat the figures in this article as central estimates under a moderate (SSP2-4.5) scenario rather than guarantees; the ranking of cities is far more robust than any single decimal point.

What about heat in Australia and the UAE — aren't those already hot?

Yes, and it shows in the scores. Australian cities rank well despite heat because of heavy investment in water recycling, desalination, and heat-resilient design. Dubai ranks lower and carries a "significant decline" outlook precisely because its resilience is engineered and energy-intensive rather than natural. Existing heat is less important than the trajectory and the money available to manage it.

Does moving abroad actually reduce my climate risk in a measurable way?

For a family relocating from a high-exposure city to a resilient one, the change is large and measurable: fewer extreme-heat days, a far lower "climate tax" on the household budget, dramatically lower heat-related mortality risk, and cleaner air for children. The Lagos-to-Auckland comparison — a roughly $8,380 annual cost difference and a child asthma rate of 7.8% versus 18.5% — captures the scale. The gains are real, but they come bundled with the ordinary costs and adjustments of migration, which are worth planning for in full.

Understanding these trajectories does not mean abandoning the cities you love. It means making informed decisions with clear eyes about the physical reality of the next two decades. For millions of professionals in climate-vulnerable cities, that informed decision increasingly points toward the same set of destinations — places where the air is clean, the water is abundant, the infrastructure is resilient, and the future still looks liveable.