A duststorm hit several parts of the national capital on Wednesday evening, the MeT department said.
A thick haze was hanging over the city due to the duststorm, affecting visibility.
A MeT official said thunderstorm and light rains are also expected because of a western disturbance and it is likely to bring down temperature.
Private weather forecaster Skymet Weather said parts of Delhi and NCR could also see "heavy showers".
The Palam observatory recorded a high of 43.4 degrees Celsius and a low of 32.4 degrees on Wednesday.
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