Heat-related deaths in the Middle East and North Africa (MENA) will be 60 times higher by the end of the century if no climate action is taken, researchers have said.
Around 123 people in 100,000 are predicted to die compared with two in 100,000 now, more than any other region in the world.
Iranians will suffer most, with 423 deaths per 100,000, while in Palestine, Iraq and Israel more than 160 people per 100,000 will die, the research found.
The UK in comparison will see a rise from three to nine deaths per 100,000 by the 2080s under what the Intergovernmental Panel on Climate Change (IPCC) deems a high emissions scenario, where countries enact no mitigation policies.
Gulf states such as the United Arab Emirates, where the next UN climate conference – Cop28 – is to be held, would see the greatest relative increase in heat-related deaths.
The researchers found more than 80% of these deaths can be prevented if the global average temperature is kept to 2C above preindustrial levels, the target set in the Paris Agreement.
Professor Shakoor Hajat, of the London School of Hygiene and Tropical Medicine, and lead author of the study, said current heat-related deaths in the MENA region are relatively low because of a young population, air conditioning and knowledge of how to avoid the hottest temperatures.
He said: “We quantified what the impacts are of current weather patterns and also projected what future burdens will be, based on what the climate models project the warming will be like.
“We estimate that under a high emission scenario, the number of deaths could multiply by 60 times current levels and that’s partly down to the warming but also because of the increases in the population size, ageing of societies and other socio-economic factors.”
The researchers modelled current (2001 to 2020) and future (2021 to 2100) trends in heat-related mortality in 19 countries in the MENA region.
Under the IPCC’s high emissions scenario, most of the MENA region will experience substantial levels of warming by the 2060s despite currently having a relatively low level of heat-related deaths compared with cooler countries.
Temperatures in the MENA region could rise to around 50C by the end of the century which puts people with cardiovascular, respiratory and kidney problems, as well as those with diabetes and other neurological problems, at greater risk, Professor Hajat said.
A high emissions scenario would create conditions never before experienced by human beings and could make parts of the MENA region uninhabitable.
Professor Hajat said: “There are studies that have shown that some parts of the region will become uninhabitable because of the limits to the physiological response to the heat.
“There are already countries that have days when temperatures can reach 50C and if that becomes the norm it really will mean that there could be large-scale population displacement because these kinds of conditions are just not liveable.”
The Synthesis Report is out! 👉 https://t.co/zAMzd12lR7#Globalwarming of 1.1°C has resulted in more frequent & more intense extreme weather events that have caused dangerous impacts on nature & people worldwide.
Every increment of warming results in rapidly escalating hazards. pic.twitter.com/ojYogB1ehA
— IPCC (@IPCC_CH) March 31, 2023
The study, published in The Lancet Planetary Health, covers only one particular aspect of climate change when there are also others that are likely to impact negatively on human health, Professor Hajat said.
He added that he would like to see better health data in MENA countries so that climate change impacts can be more accurately predicted and that even if the global temperature is limited to 2C, countries will still need to adapt.
He said: “Even with stronger action, countries in the region need to develop ways other than air-conditioning to protect their citizens from the dangers of extreme heat.
“Strengthening health systems and better co-ordination between MENA countries will be key in tackling the health impacts of climate change in the region.
“With Cop28 coming up, discussions are needed to consider how countries in the region can better work together to improve resilience in the face of climate change.”
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