Global Population Facing Extreme Heat Set to Double by 2050

A recent study published in *Nature Sustainability* indicates that the number of people living in extreme heat conditions is projected to increase from 1.54 billion in 2010—representing 23% of the global population—to 3.79 billion by 2050, which would account for 41% of the expected world population. The study warns that if global temperatures rise by 2°C above pre-industrial levels, no region will be spared from the consequences of extreme heat. Countries such as India, Nigeria, Indonesia, Bangladesh, Pakistan, and the Philippines are expected to experience the largest affected populations, while the Central African Republic, Nigeria, South Sudan, Laos, and Brazil will see the most significant increases in dangerously high temperatures.

Number of people living in extreme heat to double by 2050 if 2C rise occurs, study finds

The authors of the study emphasize the need for immediate adaptation measures, as most changes in energy demand for cooling and heating will occur before the world reaches the 1.5°C threshold set by the Paris Agreement. Dr. Jesus Lizana, the lead author and Associate Professor in Engineering Science, notes that countries with colder climates, such as Canada and Norway, will face a disproportionate increase in uncomfortably hot days, with some regions experiencing more than a 200% increase in extreme heat days. This shift poses challenges for infrastructure and health systems, particularly in areas designed for cooler conditions.

Global population living with extreme heat to double by 2050Global population living with extreme heat to double by 2050 - Oxford studyNumber of people living in extreme heat to double by 2050 if 2C rise occurs, study finds

Dr. Radhika Khosla, an author of the study from the Smith School of Enterprise and the Environment at Oxford University, stated, “This is a really core finding because it tells us that we need to act much earlier in supporting measures for adaptation and mitigation.” She highlighted that even wealthier nations like the UK will struggle with the impacts of extreme heat due to outdated infrastructure primarily designed for colder climates. The UK National Grid's request to activate coal-fired power plants during a recent heatwave exemplifies the urgent need for adaptation.

Number of people living in extreme heat to double by 2050 if 2C rise occurs, study findsGlobal population living with extreme heat to double by 2050Global population living with extreme heat to double by 2050 - Oxford study

While the study presents alarming projections, some critics argue that the focus on adaptation may overshadow the necessity for aggressive emissions reductions. They contend that without substantial cuts to greenhouse gas emissions, the projected increases in extreme heat will be inevitable, exacerbating existing inequalities and health risks.

Global population living with extreme heat to double by 2050

The study's findings align with other research indicating a significant rise in global energy demand for cooling systems, which is expected to surpass heating demands in the coming decades. However, there is a lack of consensus on the exact timeline and regional impacts, particularly regarding how quickly different areas will need to adapt to these changes.

Global population living with extreme heat to double by 2050

The study serves as a wake-up call for policymakers and communities worldwide, urging immediate action to decarbonize the building sector and develop resilient adaptation strategies. The open-source dataset accompanying the study provides a valuable resource for sustainability planning and development policy, highlighting the urgent need for comprehensive responses to the impending challenges posed by climate change.

Global population living with extreme heat to double by 2050