Schools in India’s capital must ring regular bells to remind schoolchildren to drink water as the megacity gears up to face heatwave conditions, a new city order has said. Summer heat in the world’s most populous nation can be brutal – putting millions of people at risk, with nearly 11,000 people dying due to heatstroke between 2012 and 2021, according to government data. A heatwave in May 2024 in New Delhi saw temperatures match the capital’s previous record high: 49.