Karachi [Pakistan], August 3 (ANI): The Pakistan Meteorological Department has issued a weather forecast predicting heavy rainfall in Karachi from August 4 to 7, Geo News reported. After experiencing light rain and drizzle on Thursday and Friday, the city is expected to see more significant rain showers starting from Friday. The effects of the monsoon system will appear starting from Friday (today) as light to torrential rain showers can take place in the port city, as per Geo News. According to the weather department, the monsoon system will bring light to heavy rain, with some areas potentia…