A strong high-pressure system prevailing in the upper atmosphere is driving the extreme conditions, which are forecast to persist for at least three to four more days.
Daytime temperatures are likely to soar 5 to 7°C above seasonal averages in northern and central regions—including Islamabad, Punjab, Khyber Pakhtunkhwa, Kashmir, and Gilgit-Baltistan—until May 19.
In the southern half, including Sindh, southern Punjab, and Balochistan, temperatures are forecast to stay 4 to 6°C above normal through May 20.
On Friday and Saturday, most areas are expected to experience very hot and dry conditions, with southern and central districts particularly affected.
During the past 24 hours, hot and dry weather prevailed nationwide, with very hot conditions in the plains.
The highest temperatures recorded were 48°C in Turbat and Dadu, and 47°C in Dera Ghazi Khan.
Major urban centres like Islamabad, Lahore, Karachi, Multan, and Peshawar are forecast to experience daily highs between 40°C and 48°C through the weekend.
Coastal cities such as Karachi will remain hot and humid, while interior districts like Dadu and Mohenjo-Daro may see highs exceeding 50°C.
Authorities advise the public to stay hydrated, avoid outdoor activities during peak hours, and take heatwave precautions, especially for vulnerable populations.