The vast, lush, green of Siberia’s forests is black and smouldering. The fires rage on, already scorching an area the size of Belgium, Luxembourg and The Netherlands combined - seven million hectares. I can see the haze 4500km away...

“You feed a reindeer and step away - and it suddenly drops dead. Within a day it swells up like a ball ready to burst. We thought the heat was to blame, as they were still in their thick winter coats. A neighbour lost 50 of them.” ...