A key global temperature limit is likely to be reached in one of the next five years, acooring to a study said.
The conclusion comes in a report published by the World Meteorological Organization (WMO), reports the BBC.
The analysis is based on modelling by the UK Met Office and climate researchers in 10 countries including the US and China.
According to the report, by 2025 there is a 40% chance of at least one year being 1.5C hotter than the pre-industrial level.
That is the lower of two temperature limits set by the Paris Agreement on climate change.
In the last decade, it was estimated that the chance of any one year reaching the 1.5C threshold was only 20%.