Most days, Genna Metillo spends hunched over a sewing machine in a poorly ventilated factory in an industrial zone about 30 kilometres (18.6 miles) south of Manila, the Philippines, making clothes for international fashion brands.
The pace is punishing under normal circumstances, with high production quotas meaning workers don’t have time to pause, even to go to the bathroom or grab a glass of water. As temperatures soared in April, the…