According to Afghan government officials, more than 150 people have died during the country's worst winter in more than a decade.

"This is within a context of six million people, it's an astonishing number of people, knocking on famine's door, in famine-like conditions, six million people, it's unparalleled as far as I know," Griffiths said.

The winter, which has seen temperatures dip as low as --29.2 degrees Fahrenheit, has hit Afghanistan in the middle of a severe economic crisis.