A vendor sells second-hand electric fans along a street in Manila amid a heatwave.—AFP • South Sudan closed its schools to 2.2m students in March • Thousands of schools in Philippines, India shut in April • 17pc of children already out of school DHAKA: Hena Khan, a grade nine student in Dhaka, has struggled to focus on her studies this week as temperatures surpassed 43 … Continue reading Learning gaps widen as extreme heat shuts schools for millions