Extreme heat waves with conditions “intolerable to humans” may become a regular occurrence in the Persian Gulf by century’s end, according to a study evaluating the consequences of unchecked global warming. Temperature and humidity levels exceeding anything previously recorded on earth may bake major cities including Abu Dhabi, Dubai, Doha and Dharhan, according to the research published Monday in the journal Nature Climate Change. Less severe but still “extremely dangerous” heat waves, now seen once every 20 years or so, would become “the normal summer day,” said Elfatih Eltahir, an engineering professor at the Massachusetts Institute of Technology who co-authored the paper. “What we are talking about is significantly more severe than people have experienced anywhere before,” Eltahir said in a conference call with reporters. The most extreme conditions “would exceed what a human body may be able to tolerate.” The research studied what scientists call “ wet bulb […]