The India Meteorological Department (IMD) has issued a red alert for thunderstorms and heavy rainfall in parts of Delhi-NCR as rain lashed several areas of the national capital on Thursday, bringing relief from the prevailing heat.The weather department has forecast cloudy skies, moderate spells of rain and strong surface winds over the city.Meanwhile, a red alert has also been issued for the Konkan belt consisting of Goa and South Gujarat. An orange alert has been issued for Mumbai, with the possibility of heavy rainfall at a few places, leading to waterlogging in low-lying areas.On Wednesday, the IMD said conditions are favourable for the further advance of the southwest monsoon into more parts of Gujarat, Madhya Pradesh, Uttar Pradesh, Haryana, Chandigarh, Delhi, Punjab and parts of Rajasthan over the next two days.According to the IMD, Delhi recorded a maximum temperature between 33°C and 34.8°C on Wednesday, marking a significant drop from the earlier heatwave conditions. The department has forecast Thursday's maximum temperature to remain between 32°C and 34°C, accompanied by light to moderate rain and gusty winds.Meanwhile, IMD officials said the southwest monsoon is expected to advance further across several parts of North India in the coming days.Senior IMD scientist Naresh Yadav said the monsoon is likely to cover additional areas, including Punjab, Haryana, Delhi-NCR, Uttar Pradesh and parts of Gujarat's west coast. He added that extremely heavy rainfall is expected over the Konkan region, Goa and South Gujarat over the next four to five days, prompting the IMD to issue a red alert for these regions.Yadav further said that very heavy rainfall is also likely over Odisha and parts of central India.