The highest temperature recorded in Delhi before this was 47.4 degree Celsius at Palam on June 16, 1995.
The weather office also said that the Indira Gandhi International Airport and the adjacent areas of South West Delhi are likely to be hit by thunderstorm and dust storm this evening.
Airport authorities say that such severe conditions will affect flight movement because the atmosphere becomes unstable. The aircraft will not get the required thrust during lift-off; they will have to carry less baggage, authorities said.
The city has been witnessing a spell of hot weather over the past few days, with temperature hovering around 45 degrees Celsius.
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