Karachi to receive 'above normal' rain this year.

Karachi is expected to have a longer than usual monsoon season this year, according to a top official of the Pakistan Meteorological Department (PDM).

According to the PMD forecast, the monsoon season will begin in the metropolis on 29 June.

Talking to Geo News, Chief Meteorologist Dr Sardar Sarfraz Friday said that the longer the heatwave lasts, the more will be the rainfall.

This year, the heatwave began as early as February, he said.

The heat wave came a little early in Karachi. The first spell was between 11-14 March, and the second spell occurred in the last days of the same month. This year, a lengthy heatwave affected Sindh and later southern Punjab, which is expected to result in a prolonged monsoon.

According to Dr Sarfraz, the monsoon season will span July, August, and September.

He further stated that Karachi, western Sindh, including Jamshoro, and Balochistan will have a 20 to 30% increase in precipitation.

Heatwave and arid climate

According to Dr Sarfraz, persistently dry weather causes heatwave.

He stated that when the pressure in the upper atmosphere rises, air sinks, resulting in compression and finally heatwave conditions develop.

He said that the region's aridity is caused by the Pacific Ocean's lower-than-usual temperature and that the unusually protracted heatwave was also a result of climate change.

Urban...