Humidity during the morning hours was recorded at 60 per cent, the official added.
He said lightning strikes, rains and gales were likely in Srikakulam, Vizianagaram and Visakhapatnam districts in north coastal Andhra, besides in Anantapuramu, Chittoor, Kadapa in Rayalaseema and SPS Nellore in the south coast.
Uttar Pradesh and Rajasthan have alone witnessed over 120 deaths due to thunderstorm and violent winds in the first week of May.
The Delhi Fire Service said it received over 30 calls linked to falling trees and two calls related to wall collapse within two hours of the storm hitting the national capital. As many as 10 flights have been diverted at the airport so far.
According to a PTI report, the government said that all evening schools (a second shift which starts from the afternoon) will be shut on Tuesday. "It was over a hundred on Sunday", said an IMD official. The Palam observatory recorded a wind speed of 96 kmph, the officer said. The dust storm interrupted a programme that Delhi Chief Minister Arvind Kejriwal was to attend at IP Extension.
The strong wind crashed through trees and turned the air a murky brown.
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As of 10.30 a.m., police reported that at least nine people had been killed, while at least 40 had been injured in the attacks. Hundreds of Indonesians have flocked to fight with IS, sparking fears that extremist outfits could get a new lease on life.
According to the Delhi Metro Rail Corporation (DMRC), services on the Violet Line were affected for 40 minutes as trains ran in two loops between Sarita Vihar and Escorts Mujesar, and between Nehru Place and Kashmere Gate stations from 5 pm to 5:40 pm.
Operations at the Delhi airport came to a halt due to the dust storm.
The Northern Railways said train movement was disrupted on the section between the Hazrat Nizamuddin and Palwal stations due to uprooted trees.
A western disturbance, which is a system of low pressure bringing moisture from Eurasian water bodies, and moisture-bearing easterly winds triggered the thunderstorms and rain in Delhi on Sunday, the weather department said. We had forecasted that the weather will be adverse for 2-3 days.
Power supply was affected in many areas in Delhi and Gurugram in Haryana.
♦ Heat wave conditions very likely at some places with severe heat wave at one or two pockets over Vidarbha and at some places over West Madhya Pradesh and at one or two pockets over Telangana, north Madhya Maharashtra, Marathwada, East Madhya Pradesh and Rajasthan.