Guardian: It is bitterly cold in Delhi. A bone-chilling wind has left temperatures below 3C (37F), the lowest since records began in 1969, and at least 100 homeless people are said to have died.
But temperatures in the mega-city that is now home to an estimated 18 million people can be expected to rise to a sizzling 46C if there is a heatwave in May, and the city is often unbearably hot by the time the monsoon arrives at the end of June.
Now, Indian government-backed research shows that both Delhi and...