Sardar Sarfaraz said that the highest temperature in Dadu, Larkana, Nawabshah, and Khairpur districts would likely exceed 50 degrees Celsius. The heatwave has gripped Larkana, Sukkur, and Dadu.
According to a weather official, March of this year remains the warmest in the past seven decades.
The Met Office previously forecast that a severe heatwave would engulf the whole of Sindh from 11/12 May to 16 May.
Dadu, Sukkur, Larkana, Jacobabad, Shaheed Benazirabad, Noshero Feroz, Khairpur, Shikarpur, and Ghotki, daytime highs would reach 46 to 48 degrees Celsius.
During the period, Jamshoro, Hyderabad, Badin, Thatta, Mirpurkhas, and Umerkot recorded temperatures between 43 and 45 degrees Celsius.
Due to the high pressure in the upper atmosphere, the Met Office had predicted extreme heatwave conditions throughout the country.
In upper Punjab, Islamabad, Khyber Pakhtunkhwa, Gilgit-Baltistan, and Kashmir, daytime highs will likely remain 7 to 9 degrees Celsius above average.
The daytime temperatures in Upper and Central Sindh, Central and South Punjab, and parts of Balochistan will likely be 6 to 8 degrees Celsius above average.
The Met Office has warned that sweltering and dry conditions might lead to water stress in water reservoirs, crops, vegetables, and orchards.
The elevated temperature may increase energy demand. It may boost the river's base flow.
The weather service has been cautioned to manage crop water appropriately, and the general population has been warned to avoid undue exposure to direct sunshine.