Factories across Bangladesh, the world’s second-largest clothes supplier, have turned off fans and coolers due to energy cuts caused by the Iran conflict, with workers sweltering and a drop in productivity likely costing billions of dollars. As Bangladesh enters the hottest time of the year, since late April the garment industry belt around the capital Dhaka has endured alternating rain and scorching heat. Temperatures have reached 37 Celsius with high levels of humidity.