The climate projections published in recent years outline a world map that is profoundly redrawn by 2050. The combination of extreme heat and high humidity threatens to make certain regions nearly uninhabitable for part of the year, while other areas, currently less sought after, could see their attractiveness soar. Knowing where to live in 2050 worldwide involves cross-referencing climate data, urban dynamics, and adaptation capacities that vary significantly from country to country.
Thermal stress and humidity: areas tipping into the uninhabitable
The most discriminating criterion is not temperature alone, but the heat-humidity combination, measured by the wet-bulb temperature. When this threshold persistently exceeds the human body’s thermoregulation capacity, no acclimatization or mass air conditioning is sufficient to protect the most exposed populations.
Climate study syntheses relayed by NASA identify southern Asia (Pakistan, Bangladesh, northern India), the Persian Gulf (Kuwait, Qatar, Bahrain), and the Red Sea coasts as regions where this critical threshold could be regularly exceeded by mid-century. These territories, however, concentrate several hundred million inhabitants.
Considering where to live in 2050 worldwide thus first involves ruling out areas where the climate will become physiologically dangerous, even before comparing the economic or real estate attractions of the remaining destinations.
This framework reverses the usual logic of expatriation: it is no longer the desire for sunshine that guides the choice, but the escape from an excess of humid heat that has become structural.
Cities and infrastructure in 2050: the urban climate gap
The question does not only arise at the country level. About three-quarters of the world’s major cities will have a climate radically different from that for which their infrastructure was designed, according to projections compiled by several international research teams. Nearly 70% of the global population will live in urban areas by 2050, which amplifies the issue.
The examples are striking: by mid-century, London’s climate is expected to resemble that of Barcelona, and Seattle’s climate will be akin to San Francisco’s. These shifts imply that cities currently considered temperate will have to manage heat waves, droughts, or flooding events for which they are not equipped.
What this changes for choosing a destination
A country that is generally well-ranked on climate resilience indices may host vulnerable metropolises due to the lack of adaptation of their water, transport networks, or real estate stock. Conversely, a medium-sized city with an ambitious adaptation plan may offer better living conditions than a capital better located in latitude.
The criteria to watch exceed mere weather:
- The capacity of the drinking water network to withstand prolonged droughts, a critical point in southern Europe and North Africa
- The thermal insulation of the existing real estate stock, which determines the livability of housing during repeated heatwaves
- The density of urban green cover, the only passive lever capable of significantly reducing heat islands
- Local governance regarding climate planning, often more decisive than national policy
France in 2050: which regions resist heatwaves the best
In France, projections indicate a fivefold increase in heatwaves by 2050, according to the High Council for Climate. Climatologist Françoise Vimeux summarizes the trajectory: a heatwave experienced today as exceptional will be perceived as normal in twenty-five years.
The northwest quarter of the country (Brittany, Pays de la Loire, Normandy) retains a relative advantage due to oceanic influence, but no French region will be completely spared from extreme heat episodes. Lyon, for example, faces concerning forecasts with peaks that could regularly exceed current alert thresholds well before 2050.
The Atlantic coast accumulates another risk: rising waters and coastal erosion, which diminish the climatic appeal of certain municipalities along the western coast. Choosing a resilient French city requires cross-referencing thermal projections with exposure to flooding and water availability.
ND-GAIN Index and the limits of country rankings
The American University of Notre Dame publishes the ND-GAIN, an index based on 45 indicators assessing the vulnerability of states to climate change, their adaptation capacity, and the quality of their infrastructure. Scandinavian countries, New Zealand, and Canada consistently rank at the top of this list.
These results deserve nuance. A national index masks considerable regional disparities. Canada, for example, benefits from a high overall score, but its Western provinces are already experiencing megafires and unprecedented heat domes. New Zealand, often presented as a refuge, faces increasingly violent cyclones in its North Island.
What the indices do not measure
Country rankings generally do not incorporate land and real estate dynamics. However, the influx of population into areas deemed resilient is already causing a rise in land prices in certain regions of northern Europe and western France.
They also do not capture the actual capacity for accommodation in terms of employment, healthcare services, or local food production. Migrating to a climatically favorable area guarantees nothing if social infrastructures do not keep pace.
The most reliable framework remains one that combines the climate index with three variables rarely cross-referenced in public rankings:
- The food dependency rate of the region, meaning its ability to locally produce a significant portion of its food
- The pressure on water resources by 2050, including groundwater, not just annual precipitation
- The ratio between the projected population and the capacity of local public services (hospitals, schools, transport networks)
The available data do not yet allow for a definitive ranking of the “best” destinations for 2050. Climate projections remain subject to the emission scenarios adopted, and the adaptation capacity of territories depends on political decisions that have yet to be made. What is emerging with reasonable certainty is that the choice of a living location by that horizon will rely less on a geographical crush than on a cold analysis crossing climate, water, food, and local governance.