Dozens of flights were diverted to cities such as Jaipur, Amritsar and Lucknow, the sources said.
A thunderstorm accompanied with squall with wind speed reaching 50-70 kilometres per hour are "very likely" at isolated places over east Uttar Pradesh, Assam, Meghalaya, Nagaland, Manipur, Mizoram, Tripura, Gangetic West Bengal, Odisha and Jharkhand, the IMD had said. South-easterly and easterly winds are creating moisture and high temperature in the region which caused the formation of thunder clouds.
Meanwhile, one person died and two others were injured when lightning struck Jammu and Kashmir's Anantnag district on Saturday. No casualty or injury was reported in the incidents, the officer said.
Thunderstorm and dust storm with winds speeds of up to 70 km per hour are "very likely" tomorrow in 26 districts of Uttar Pradesh, the weather office warned.
The Met official said Sunday morning was the hottest of the season, with minimum temperature recorded at 30.6 degrees Celsius, five notches above the season's average.
Traffic came to a standstill at several areas in Delhi while Metro services along the Noida-Dwarka line was stalled for 30 minutes.
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Two people died and 18 others were injured in Delhi, while 11 people lost their lives and 34 got injured due to the dust storm in different regions of Uttar Pradesh, including Kannauj, Aligarh, Kasganj, Sambhal, Bulandshahr, Ghaziabad, Greater Noida, Auraiya and Sambhal.
All the flights from Delhi airport were temporarily grounded and Delhi Metro services were also affected.
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.
The Northern Railways said the train movement was disrupted on the section between the Hazrat Nizamuddin and Palwal stations due to tree felling.
As Delhi Metro services were badly affected due to technical snags, commuters had a horrowing experience even as radio taxis and online taxi services were not readily available as demands soared multiple times. There is no problem anywhere in the network, the DMRC said in the statement.