LAHORE - The plains of Sindh and Punjab including the City remained in the grip of severe heat wave on Tuesday with experts predicting the harsh weather conditions to persist during the next 24 hours. However, westerly wave over upper parts of the country and tropical cyclone in Arabian Sea could cause decrease in the mercury level by giving rainfall of varying intensities in various parts of the country after Thursday evening. In Lahore, harsh weather conditions forced the people to stay indoors. They avoided unnecessarily coming out on roads that caused considerable decrease in traffic at noon. Major markets presented a deserted look during the daytime. Lahore canal as usual attracted a large number of people including women and children at noon and in the afternoon. Not only youths but also elderly people were seen beating the heat by taking a dip in the mud colour canal water. At some places, even women were seen taking a bath in the canal water. According to the experts, a fresh westerly wave is likely to affect upper parts of the country from Wednesday evening and is likely to persist for next 3-4 days. Mondays deep depression formed over west central Arabian Sea has intensified into tropical cyclone. Presently, it is located at about 1100 kilometre south southwest of Karachi. On Tuesday, maximum and minimum temperature in the City was recorded 45 degree Celsius and 28 C respectively. Relative humidity in the morning was recorded 30 percent, which decreased to 14 percent in the evening. Local meteorological department has forecast mainly hot and dry weather over most parts of the country including the City during the next 24 hours. However, rains are expected at isolated places of Gilgit-Baltistan and Kashmir.