Delhi is also experiencing strong, hot winds called “loo.” These winds come from the desert areas (that are in close proximity to Delhi) and push up the temperature even more. When these winds blow, the air becomes drier and hotter, leading to heatwave conditions. The IMD defines a heatwave as when the temperature is at least 4.5°C above normalDelhi is also experiencing strong, hot winds called “loo.” These winds come from the desert areas (that are in close proximity to Delhi) and push up the temperature even more. When these winds blow, the air becomes drier and hotter, leading to heatwave conditions. The IMD defines a heatwave as when the temperature is at least 4.5°C above normal