A heavy rainfall warning has also been issued in parts of Gujarat in the next few days.
"The Palam Observatory recorded an all-time high of 48 degrees Celsius Monday. The factors that led to this are dry westerly winds, no effect of a western disturbance in the plains and intense heating in the month of June," India Meteorological Department said.
Fishermen have been advised not to venture out to sea over the next four days as squally weather with rough winds is predicted.
Weather forecast Today, Monsoon and Temperature today India: The IMD has predicted heavy rainfall in isolated places over Kerala, Lakshadweep and the Andaman and Nicobar Islands, apart from the northeastern states.
The red alert has been issued in Thrissur district on June 10 and in Ernakulam, Malappuram and Kozhikode districts on June 11. All four districts on these dates will experience 'isolated heavy to very heavy' rainfall as part of monsoon showers.
Weather forecast and Temperature HIGHLIGHTS: "A low pressure area is very likely to form over southeast and adjoining eastcentral Arabian Sea off Kerala-Karnataka coast around 9th June. It is likely to move north-northwestwards and intensify gradually," IMD further said.
India Meteorological Department (IMD) officials said the mercury is set to soar in the coming days, with some respite expected Tuesday in the form of thundershowers.
Earlier, the normal onset date for monsoon over Kerala was June 1, marking the official commencement of the four-month-long rainfall season in the state.
Skymet Weather, a private forecaster, said the monsoon may take at least a week longer to reach the city.
The normal onset date for monsoon over Kerala is June 1 which also marks the official commencement of the four-month-long rainfall season.
Weather forecast and Temperature today India Highlights: Heavy to very heavy rainfall is expected in northeastern states of Nagaland, Manipur, Mizoram, Tripura, Assam and Meghalaya.
Churu, a city in the west of the northern state of Rajasthan, recorded the country's highest temperature of 48.9 Celsius (120 Fahrenheit) on Monday, according to the Meteorological Department.
Weather forecast and Temperature today India LIVE News HIGHLIGHTS: There was a slight relief for Odisha and Telangana after the states received scattered rains. However, there was no relief from heatwave conditions in most parts of the country with Churu remaining the hottest at 50 degrees Celsius.
The Safdarjung Observatory, which provides official figures for Delhi, recorded a high of 43.5 degrees Celsius, three notches more than the normal, and a low of 27.6 degrees Celsius. Humidity levels oscillated between 30 per cent and 56 per cent.
IMD also informed that is is 'very likely' that thunderstorm and lightning accompanied by gusty winds will be witnessed at isolated places from June 1-June 3. The wind velocity is expected to increase further from June 4 onwards.
Weather forecast today live updates: Delhi is expected to record a high of 45 degrees Celsius and a low of 28 degrees Celsius on Saturday.
In its second stage of Long Range Forecast (LRF), the IMD has stated that the rainfall for the country as a whole would be 96 per cent of the Long Period Average (LPA) for the four-month monsoon season.
The city is likely to record a high of 45 degrees Celsius and a low of 29 degrees Celsius on Saturday. Any relief from the scorching heat is unlikely in the next four-five days, a MeT official said.
Weather forecast and Temperature today India LIVE News Updates: In the coming days, heat wave conditions are also expected in some parts of west Madhya Pradesh, Telangana, Marathwada and in isolated pockets of Jammu and Kashmir, Himachal Pradesh, Uttarakhand, Punjab, Haryana, Chandigarh and Delhi, west Uttar Pradesh and east Rajasthan.
Weather forecast today LIVE UPDATES: Temperatures will soar in some parts in Vidarbha and at isolated pockets in Madhya Maharashtra, Telangana, East Madhya Pradesh, Chhattisgarh, East Uttar Pradesh, Jharkhand, and Odisha.