The India Meteorological Department on Wednesday issued a for Delhi until Friday.

are expected to range between 43 degrees Celsius and 45 degrees Celsius.

The weather agency also issued a heatwave warning for Punjab, Haryana, Chandigarh and Rajasthan.

The India Meteorological Department for a region when the temperature crosses 40 degrees Celsius in the plains, 37 degrees Celsius in coastal areas and 30 degrees Celsius in the hills.

On Wednesday, the national capital recorded a of 43.3 degrees Celsius, with the India Meteorological Department indicating a heat index value of 51.9 degrees Celsius by evening, The Indian Express reported.

The heat index value, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature.

As per the weather agency, Delhi is likely to experience relief from the heat by this weekend. Thunderstorms and lightning accompanied by strong winds of 50kmph are expected.

India Meteorological Department scientist Naresh Kumar told PTI that a is likely to affect northwest India from Friday night. It may bring rain and thunderstorms to Delhi, he added.

This year, India experienced the since 1901. The weather agency started maintaining the records in 1901.

The India Meteorological Department noted that there was an increase of 1.34 degrees...