Earth had its hottest May ever [recorded] last month, continuing an unrelenting climate change trend as 2020 is set to be among the hottest 10 years ever, scientists with the Copernicus Climate Change Service announced on Friday.

It’s virtually certain that this year will be among the top hottest years in recorded history with a higher than 98% likelihood it will rank in the top five, according to the National Oceanic and Atmospheric Administration.

The last month has been the warmest May on record globally and this is unquestionably an alarming sign,” said Freja Vamborg, a scientist at Copernicus Climate Change Service, an intergovernmental agency that supports European climate policy.

Even more concerning is the fact that average temperatures of the last 12 months have become one of the hottest 12-month periods ever recorded in our data set,” she said.

The most above-average temperatures were recorded over parts of Siberia—where temperatures were up to 10 degrees Celsius above average—as well as Alaska and Antarctica, according to the new research.

The last 12-month period, from June 2019 to May 2020, was nearly 0.7 degrees Celsius (about 1.3 degrees Fahrenheit) warmer than average. Globally, May was 0.63 degrees Celsius (about 1.1 degrees Fahrenheit) warmer than the average May recorded from 1981 to 2010.

The continuous upward trend in global temperatures results from greenhouse gas emissions that change the climate.

2019 was the second-hottest year ever, capping off the world’s hottest decade in recorded history. And six of the warmest years on record were during the past decade.

The rising temperatures are accompanied by countless climate disasters, including rapid ice melt in Greenland and Antarctica, devastating wildfires from Australia to California and more intense and frequent hurricanes and heat waves.

Human-caused global warming shows no signs of decline. Nations in the 2015 Paris Agreement on climate change vowed to cap emissions to curb global warming to 1.5 degrees Celsius (2.7 degrees Fahrenheit) above pre-industrial levels, but they are nowhere near on track to meet that goal.

First published by CNBC, 5 June 2020