The IMD declares a heatwave when the maximum temperature reaches at least 40 degrees Celsius in the plains or 30 degrees Celsius in the hilly regions, or when the departure from usual is between 4.5 degrees Celsius and 6.4 degrees Celsius.
The IMD declares a heatwave when the maximum temperature reaches at least 40 degrees Celsius in the plains or 30 degrees Celsius in the hilly regions, or when the departure from usual is between 4.5 degrees Celsius and 6.4 degrees Celsius.