The Met Office said on Wednesday that a heatwave was likely to grip large parts of the country from May 15 to May 20, reported 24NewsHD TV channel.
It said that during this period, temperatures in south Punjab, Sindh and Balochistan were likely to remain 4 to 6 degrees Celsius above average, while 5 to 7 degrees Celsius above average in upper Punjab, Khyber Pakhtunkhwa (KP), Kashmir and Gilgit-Baltistan (GB).
The Met Office said that excessive heat would accelerate the melting of snow over the mountains.
It advised children, women and the elderly to take precautionary measures.
Similarly, it advised farmers to protect their cattle from above-normal temperatures.
The Met Office, however, forecast rain accompanied by hailstorms for Islamabad, Kashmir and GB on May 19 and May 20.
PDMA Punjab issues alert
Also on Wednesday, while issuing a heatwave alert, the PDMA Punjab DG directed the commissioners and the deputy commissioners across the province to remain on their toes.
He also directed the concerned departments namely school education, health, transport, local government and Rescue 1122 to remain alert in view of the situation.
However, the DG said that the weather would become pleasant following rains in large parts of Punjab on May 19 and May 20 following the penetration of a westerly wave in the evening of May 19.
Reporters: Rozeena Ali and Kalim Akhtar