Global temperates are likely to hit their highest average level ever within the next four years, according to a report published Thursday by the United Nations' World Meteorological Organization.Overall, WMO's report projects an 86% chance that the world will experience its warmest year ever between 2026 and 2030, with a 91% chance that "the global mean near-surface temperature will temporarily exceed 1.5°C above the 1850-1900 average levels for at least one year between 2026 and 2030."Exceeding temperatures from the pre-industrial average by 1.5°C "risks unleashing ever more severe climate change impacts and extreme weather, and decreases adaptation option," the report notes.Leon Hermanson, lead author of the report, said there's a good chance that 2027 will break all-time temperature records set in 2024 given that meteorologists are predicting an El Niño weather pattern to develop this summer and continue through the end of this year.One particularly troubling finding in the report is that "Arctic temperatures over the next five extended northern hemisphere winters (November-March) are predicted to be 2.8°C above average temperatures for 1991-2020, an anomaly more than three and half times that of global mean temperature anomaly over the same period."These higher Arctic temperatures mean likely further reductions in ice in the Barents Sea, Bering Sea, and Sea of Okhotsk, the report warns.Simon Stiell, executive secretary of the United Nations Framework Convention on Climate Change, said in a Thursday interview with The Guardian that Europe's current heatwave is a preview of what's to come the longer the global climate crisis goes unaddressed."Protecting human lives, businesses and economies from extreme heat and the many other soaring costs of climate change is core business for every nation," said Stiell, "and it starts with kicking the fossil fuel addiction much faster."