India, April 9 -- Delhi recorded the highest minimum temperature in April in three years on Wednesday at 25.6degC, or six degrees above normal, amid a heatwave, even as the air quality remained "poor" for the fourth day. The India Meteorological Department (IMD) issued a heatwave alert for the rest of the day as the mercury was expected to remain between 39-41degC.

A heatwave was declared on Monday when the maximum temperature touched 40.2degC and rose to 41degC on Tuesday. Some relief was expected from Thursday as an approaching western disturbance was expected to lead to gusty winds of 30-40 km per hour and cloudy skies.

"The prevailing weather conditions include clear skies and dry winds. This has raised both the maximum and minimum ...