10-15 per ceNt

Fall in per acre yields (one acre equals 0.4 hectare), according to farmers in the major grain-bowl states of Punjab, haryana, Uttar Pradesh, rajasthan and Madhya Pradesh

*The IMD declares a heat wave when an area registers temperatures 4.5 to 6.4 degrees Celsius above normal for that day. When temperatures rise more than 6.4 degrees Celsius above normal, it is classified as a ‘severe’ heat wave