Actually, the record is correct but not for the city's main weather station. The temperature of 49C was recorded in two of the city's outer areas one of which was Najafgarh and other was Mungeshpur.
You can select those from the left nav on IMD's website and see the results yourself.
You can select those from the left nav on IMD's website and see the results yourself.
https://city.imd.gov.in/citywx/localwx.php