The strong dust storm, with wind gusts upto 84 km/hr, accompanied by rains swept across the city bringing the temperatures down. The Meteorological Department has recorded 4.8 mm of rain so far.
"Temperatures came down below the 40 degrees Celsius mark as maximum temperature settled at 39.7 degrees Celsius, which is one notch above season's average. Minimum temperature during the day was recorded at 29.0 degrees Celsius," MeT Department officials said.
Humidity levels oscillated between 82-34 per cent.
The maximum and minimum temperatures are expected to be around 38 and 29 degrees Celsius respectively tomorrow.
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Reports of a tree being uprooted and power lines getting snapped in some areas of the national capital were also received.
A Delhi Police officer was injured in a tree collapse incident during the dust storm in Hauz Khaz area of the city.
Strong winds and rains affected the flight schedule as 16 flights were diverted between 2:30 pm to 4 pm due to bad weather. Airport official said it included 13 domestic and three international flights.