That's the breathless announcement from NASA.
There are just a couple of problems with this. One comes from today's webcam view of the Greenland Ice Cap Summit Station.
Oddly, it kind of looks as though there's a lot of ice there.
The other problem with the NASA announcement is that extensive and rapid melt events are not only not unprecedented, they are common; they occur every ~150 years - as shown by ice core data going back 10,000 years.