For the first time on record, precipitation on Saturday at the summit of Greenland fell as rain and not snow.

Temperatures at the Greenland summit over the weekend rose above freezing for the third time in less than a decade. The warm air fueled an extreme rain event that dumped 7 billion tons of water on the ice sheet. According to the National Snow and Ice Data Center, the amount of ice mass lost on Sunday was seven times higher than the daily average for this time of year.