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Parts of Asia May Be Too Hot for People by 2100

Parts of Asia May Be Too Hot for People by 2100”

A new study suggests wide swaths of northern India, southern Pakistan and parts of Bangladesh may become so hot and humid by the end of the century it will be deadly just being outdoors. At a wet-bulb temperature of 35 degrees Celsius (95 degrees Fahrenheit), the human body can not cool itself enough to survive more than a few hours. The study shows that by century's end, absent serious reductions in global emissions, the most extreme, once-in-25-years heat waves would increase from wet-bulb temperatures of about 31 C to 34.2 C. The summer of 2015 also produced one of the deadliest heat waves in history in South Asia, killing an estimated 3,500 people in Pakistan and India.

But, explain the researchers from the Massachusetts Institute of Technology (MIT) and the Loyola Marymount University in Los Angeles, we hadn't done earlier forecast of "wet heat" suffocating and its effects on the ability of the human body to adapt to it. But, temperatures will still go over 31°C, according to the study.

It indicates the capacity of evaporation of the sweat, the mechanism allowing the human body to maintain a normal temperature.

The survivability threshold is considered to be 35 degrees Celsius, or 95 degrees Fahrenheit.

About 30 percent of the population in the region would be exposed to these harmful temperatures, up from zero percent at present, said the report.

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In some places, this heat may exceed 35 degrees.

Climate change could make much of South Asia - home to a fifth of the world's population - too hot for human survival by the end of this century, scientists warned on Wednesday.

The regions most adversely affected would be likely in the north of India, Bangladesh and the south of Pakistan where they live in a total of 1.5 billion people. These are also among the poorest regions in South Asia.

"These conditions make these populations very vulnerable to these climate changes if no action is taken to minimize the warming", says Elfatih Eltahir, professor of environmental engineering at MIT, one of the main authors of the study. But in 2015, the limit was nearly reached in the Persian Gulf region, during a year when heat killed an estimated 3,500 people in Pakistan and India.

The densely populated farming regions of South Asia could fare the worst, because workers are exposed to heat with little opportunity for escape into air-conditioned environments. "With mitigation, we hope we will be able to avoid these severe projections".



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