Climate change to cause 430,000 extra deaths a year by 2050, study finds

Climate-driven temperature changes will cause approximately 430,000 additional deaths per year by 2050, with ten times more people dying in poor countries than in wealthy ones, according to the latest report from the Climate Impact Lab, a research group housed at the University of Chicago.impactlab+1

The report, released on July 26 as the second installment in the Lab's Adaptation Roadmap series, highlights what researchers call a "mortality-cooling trap"—a deadly combination of rising heat and inadequate access to electricity for cooling that leaves hundreds of millions of people in low-income nations with little means of protection.whalesbook+1

A Divide Between Rich and Poor

While wealthier populations are expected to increase their use of air conditioning as temperatures rise, around 377,000 people in areas with minimal energy access face lethal heat exposure with virtually no relief, the report finds. These areas span 18 countries and are home to 676 million people, concentrated in northern sub-Saharan Africa—Niger, Mali, Burkina Faso, and Chad—as well as parts of South Asia including Pakistan, Bangladesh, Nepal, and Myanmar.energy.economictimes.indiatimes+1

The contrast with wealthier neighbors is stark. Gulf states like Bahrain, Kuwait, and Saudi Arabia experience comparable heat but consume far more electricity for cooling. The projected increase in electricity use per person in Niger will be one-ninth that of Saudi Arabia, and communities in Niger will lose 27,000 more lives annually in 2050 due to warming than their wealthier counterpart.impactlab

"Air conditioning is a life saver, and climate change will no doubt lead to more AC adoption in today's wealthy countries," said Michael Greenstone, a co-founder of the Climate Impact Lab and professor of economics at the University of Chicago. "Our research finds, however, that in too many countries around the world people will not be able to respond in the same way."impactlab

Calls for Adaptation Investment

The report argues that alongside emissions reductions, governments must invest in practical adaptation measures including heat early warning systems, expanded healthcare access, and targeted social programs. The findings arrive amid a summer already marked by deadly heat across Europe, where an estimated 20,000 heat-related deaths were recorded during a late June heatwave.zenodo

Ashwin Rode, a fellow at the Climate Impact Lab, said the research identifies "the places most at risk of seeing more people die from the heat and least able to power up ACs to save them, so people and governments can zero in on saving the greatest number of lives."impactlab

The growth of electricity use due to warming in low-income countries is projected to be so small it would power only a single LED bulb for four months per person—underscoring the scale of adaptation investment required.impactlab