Pakistan heatwave death toll nears 700

Pakistan's prime minister has called for emergency measures as the death toll from a heatwave in southern Sindh province reached nearly 700.

Emergency medical camps have been set up in the streets of Karachi, home to 20 million people, where the temperatures have touched 45C (113F).

Power cuts in the city have made battling the heatwave massively more difficult - and there has been harsh criticism of the provincial government.

Many of the local hospitals are overrun, with one doctor quoted as saying: "we are still receiving a never ending flow of patients".

Shahzeb Jillani reports.