Across vast swathes of the planet, from California to China, authorities have warned of the health dangers of the extreme heat, urging people to drink water and shelter from the burning sun.

In Japan, authorities issued heatstroke alerts to tens of millions of people in 20 of its 47 prefectures as near-record high temperatures scorched large areas.

With the warming of the earth and the increase in temperature, British researchers have identified the vulnerable countries that are at risk of temperature, and Afghanistan, along with Paiva, New Guinea and Central America, have been introduced as high-risk countries from the destructive heat waves.

Above normal temperatures and chances of heatwave episodes during March to May, the Pakistan Meteorological Department (PMD) warned that.