'It was too hot, even to leave home': stories from the world's hottest year

From drought-hit Nigeria to wine-growing Finland, we hear from people whose lives have already been changed by a warming world

• 2016 will be the hottest year on record, UN says

In the displacement camps of north-east Nigeria, most residents have the same answer for why 2.6 million people have been forced from their homes in this region. They are running from Boko Haram, the jihadist militants who still control significant parts of the Lake Chad basin.