The planet's two largest ice sheets are melting faster then ever before - three times as fast as they were just 20 years ago.
Glaciers in the eastern and central regions of the Himalayas are retreating at an ever-increasing pace, while those in the western Himalayas may even be growing.
Almost all of Greenland's surface ice cover has melted at some point this summer - twice as much as usual. It's the largest melt ever seen in more than 30 years of satellite observations.
Eighty-year-old photos discovered by chance in a Danish basement have thrown light on how Greenland glaciers are melting today.
If climate change continues, summer sea ice in the Arctic could disappear altogether - but in the meantime Arctic ice could temporarily stabilize or even increase.
Last year's melting of the Greenland Ice Sheet was the worst ever recorded, according to research from the City College of New York.