High temperatures may continue, especially after the subdued rainfall over major parts of India. (FILE)

The north and central regions of India seethed under heatwave conditions on Friday forcing people to stay indoors, even as a severe dust storm and lightning in various parts of Uttar Pradesh killed at least 26 and left 57 injured.

The weatherman has warned of heatwave conditions continuing in north and central India next week, and predicted "severe heatwave" in Madhya Pradesh, Uttar Pradesh, Rajasthan and Maharashtra's Vidarbha from tomorrow till Tuesday.

Hoshangabad in west Madhya Pradesh was the hottest today at 46.8 degrees Celsius, while Rajasthan's Churu was close behind at 46.6 degrees Celsius.

Rainfall, however, brought slight respite from the heat in parts of Himachal Pradesh, Uttar Pradesh and some eastern states including, West Bengal, Odisha, Bihar and Jharkhand.

Heatwave continued in parts of Rajasthan notwithstanding slight drop in temperatures compared to yesterday as Barmer sizzled at 46.4 degrees Celsius, Kota at 46.1 degrees Celsius and Bikaner at 45.8 degrees Celsius.

In Delhi, temperature dipped marginally due to strong wind activity, gusting up to 20 kilometers per hour, with the national capital recording a high of 40.5 degrees Celsius, normal for this time of the year.

Light to moderate rains occurred in parts of Uttar Pradesh on Friday, where severe dust storm and lightning the previous night killed six in Mainpuri, three each in Etah and Kasganj, two each in Farrukhabad and Barabanki, and one each in Moradabad, Badaun, Pilibhit, Mathura, Kannauj, Sambhal, Ghaziabad, Amroha, Badaun and Mahoba.

Forty-one people were injured in UP's Mainpuri district while uprooted trees blocked vehicular movement on the state highways.

Police said most of the injuries occurred when people sleeping inside their mud houses were caught unawares by the thunderstorm, which was accompanied by rain, leading to wall collapse.

Thirty-one cattle died and 16 houses were also damaged in the incidents, officials said. Massive power cuts were reported from various parts of the state, including Lucknow, as electricity lines got snapped in the gale.

A financial assistance Rs 4 lakh has been announced Chief Minister Yogi Adityanath for the family of those who died, government spokesperson Shrikant Sharma said.

Haryana and Punjab continued to experience hot weather conditions in most places, with Bhiwani recording a maximum of 43.1 degrees Celsius.

Chandigarh, the joint capital of the two states, recorded a maximum temperature of 40 degrees Celsius, up one notch from normal, while Hisar in Haryana registered a high of 43 degrees Celsius, the meteorological department said.

In Punjab, the holy city of Amritsar experienced a hot day at 41.4 degrees Celsius, one degree above normal, while Ludhiana and Patiala recorded above-normal maximum temperatures of 41 degrees Celsius and 41.2 degrees Celsius respectively.

Jammu reeled under heatwave conditions recording a high of 40.3 degrees Celsius, while in the hill state of Himachal Pradesh, overnight rains brought the minimum temperature down by one to two degrees.

Despite the rains, maximum temperatures in some parts of Himachal rose by one to two notches with Una being the hottest in the state on Friday with a maximum temperature of 43.4 degrees Celsius.

Light to moderate rainfall occurred at a few places in sub-­Himalayan West Bengal, while one or two places in Odisha, Bihar and Jharkhand witnessed very light rainfall.

The severity of the heat over eastern India may also increase. Therefore, the heatwave zone could extend towards interior Odisha, north-coastal Andhra Pradesh, Jharkhand and Bihar during this period, the weather department said.

Parts of south, east and northeast India are expected to get some relief from the blistering heat, with the onset of monsoon expected to arrive in Kerala on Saturday.