The Pakistan Meteorological Department (PMD) on Wednesday predicted that the first heatwave of May will start today and prevail for the next three to four days.
It predicted that a high pressure is likely to grip most parts of the country on 15th.
Under the influence of this meteorological condition, day temperatures are likely to remain 4°C to 6°C above normal in southern half (Sindh, southern Punjab and Balochistan) from May 15 to 20.
Moreover, day temperatures are likely to remain 5°C to 7°C above normal in upper half (central & upper Punjab, Islamabad, Khyber-Pakhtunkhwa, Kashmir, Gilgit-Baltistan) from 15th to 19th.
The weather department also stated that a westerly weather system is expected to enter upper parts of the country on May 19's evening or night.
The system is expected to bring rain-wind, thunderstorm (isolated heavyfalls/hailstorm) in Kashmir, Islamabad, Pothohar region including northeast Punjab, upper Khyber-Pakhtunkhwa and Gilgit-Baltistan from May 19 to 20.
Furthermore, the PMD advised all authorities concerned to remain alert and take necessary measures to avoid any untoward situation due to heatwave conditions.