Delhiites also experienced another hot day as the maximum temperature settled at 41.5 deg C, up from yesterday's 40.6 degree C and two notches above normal.
The minimum settled at 27.6 deg C, up from 26.3 deg C and normal for this time. The humidity in the city ranged between 36 per cent and 67 per cent.
In UP, one person each was killed in Sitapur, Hardoi, Lakhimpur and Gonda districts in wall collapse and uprooting of trees during the thunderstorm.
The day temperatures at most places in Punjab and Haryana went up by a few notches, with Hisar turning out to be the hottest at 43.2 deg C.
Gurgaon in Haryana also experienced a hot day with the maximum temperature settling at 42.5 deg C, up three notches, the MeT said.
Bhiwani also experienced a hot day at 42 deg C, up three notches, while Chandigarh recorded a day temperature of 36.1 deg C.
Ambala and Karnal, however, registered less than the normal day temperature at 35.7 deg C and 35.4 deg C, respectively.
In Punjab, Amritsar recorded 40.5 deg C, Ludhiana 39.2 deg C and Patiala 37.5 deg C.
Neighbouring Rajasthan also saw the mercury soar up with Sriganganagar and Churu recording 44.9 deg C and 44.3 deg C, respectively.
Kota, Bikaner, Chittorgarh and Barmer recorded day temperatures of 43.9 deg C, 43 deg C, 42.6 deg C and 41.7 deg C. Other cities also recorded temperatures in the range of 41.3 to 39.5 deg C.