BBC: Days after a heatwave in Pakistan killed about 1,300 people, many are still puzzled by the unusually high number of deaths in the port city of Karachi, reports Shahzeb Jillani.
In his 25 years working as a charity worker transporting casualties, Mohammed Bilal has never seen so many people die of heat.
"The bodies just kept coming from all over the city," he says.
Mr Bilal is in charge of the Edhi Foundation's main office in Karachi's congested commercial district near the country's main...