Gurugram, May 29 -- Gurugram received 'very light' to 'light' rainfall at isolated places on Thursday, bringing partial relief from heatwave conditions that persisted over the past two weeks. According to the India Meteorological Department (IMD), several parts of the city, including Golf Course Road, Cyber City, Dwarka Expressway corridor and Delhi-Mumbai highway, reported drizzle around 6:30 pm. Average rainfall of 2.25 mm was recorded during initial hours, however, IMD forecast rainfall likely to continue throughout the night on Thursday. IMD officials said the weather activity was caused by two weather systems along with surface heat over the plains. An active western disturbance combined with moist easterly winds led to the forming of thunderclouds, storms and lightning, they added. The meteorological department on Thursday afternoon issued a 'red alert', warning residents to stay indoors due to thunderstorm, along with lightning and gusty winds with speed of 70 to 80-kmph. Rainfall of up to 3.5 mm was recorded at three automatic weather stations till 7:45 pm on Thursday. Wind speed also increased from 10 kmph at 5:30 pm to 25 kmph at 7:30 pm on the Delhi-Gurugram Expressway. According to IMD's latest forecast, Gurugram is likely to receive moderate to heavy rainfall till Saturday. An 'orange' alert has also been issued, warning residents of continued thunderstorm, lightning and strong winds. "The two days of rainfall is likely to bring temperature down by 6-8degC till June 1," a senior IMD official said. The city recorded a maximum temperature of 43.4degC on Thursday. Heatwave conditions started on May 14 when the mercury levels reached 37.6degC before soaring to a season's highest of 44degC on May 20. According to IMD, the city recorded a minimum temperature of 27.0degC on Thursday, up from 26.5degC on Wednesday and 24.2degC on Tuesday. Although the IMD's weather warnings for Gurugram remains in effect till Saturday, the forecast anticipates a dry spell to resurface on Sunday, extending till Monday. The city's air quality index (AQI) improved by 17 points to 174, in the "moderate" category at 4 pm on Thursday, according to the daily bulletin released by the Central Pollution Control Board. The AQI at two of the city's three active monitoring stations - Vikas Sadan (103) and Gwal Pahari (144) - remained in the "moderate" category at 8:30 pm, while the remaining station in Sector 51 (297) was in the "poor" category during the period. Meanwhile, rain also impacted flights at Delhi's Indira Gandhi International (IGI) airport, with a flight diverted to Jaipur and over 500 stood delayed through the day, as per FlightRadar24. "One diversion of an Air India flight from Coimbatore to Delhi was diverted to Jaipur," an airport official said....