"Yesterday's low pressure over Rajasthan has shifted to the east with its trough extending westwards,” the PMD’s weather outlook stated.
Due to this, isolated rains, along with thunderstorms, may occur in Tharparkar, Umerkot, Sanghar, and Badin, it added.
According to Express News, PMD’s chief meteorologist Sardar Sarfaraz has said that the heatwave is likely to start from September 14 (Tuesday). Due to reduced sea breeze and hot desert winds from Balochistan blowing towards the city, the temperature may rise, he added.
Sarfaraz further said the heatwave would be caused by low air pressure in the Bay of Bengal, and that a new monsoon cycle, from September 17, could cause rain in the city that may last till September 20.
Karachi faced intense heat last week as well as intermittent rains in various areas. The met office has said that Karachi has received 60% less rainfall than its regular monsoon season this year.
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