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Khan is one of more than 40 million students who have been shut out of classrooms in recent weeks as heatwaves have forced school closures in parts of Asia and North Africa. South Sudan already this year shuttered its schools to some 2.2 million students in late March when temperatures soared to 45 degrees Celsius . Thousands of schools in theMeanwhile, Bangladesh continues to waver between opening and closing schools for some 33 million students amid pressure to prepare pupils for exams – even as temperatures climb to dangerous levels.
US high schoolers, one May 2020 study found, performed worse on standardized tests if they were exposed to higher temperatures in the year leading up to the exam.