The world just experienced its hottest November on record while Europe had its warmest fall, according to an alarming report from the European Union's Copernicus Climate Change Service.
Temperatures were most elevated in a large region across northern Europe, Siberia and the Arctic Ocean, where sea ice was at the second lowest level ever seen in November.
The United States, South America, southern Africa, the Tibetan Plateau, eastern Antarctica and most of Australia also saw temperatures well above average.
Globally, November was almost 0.8 degrees Celsius (33.4 Fahrenheit) above the average for 1981-2010, and 0.1C (32.2F) higher than last year. And this unusual heat comes despite the cooling effect of La Niña.
Smoke blows over hills and toward the ocean at Fraser Island, on Australia's east coast, where a fire has raged for six weeks.
In Australia, a bushfire has been burning out of control for six weeks now in the popular tourist spot of Fraser Island as parts of the country swelter through a record-breaking heatwave.
"These records are consistent with the long-term warming trend of the global climate," said Carlo Buontempo, director of the Copernicus Climate Change Service at ECMWF.
He said November was "an exceptionally warm month" globally and temperatures in the Arctic and northern Siberia remained consistently high while sea ice was near its lowest extent.
"This trend is concerning and highlights the importance of comprehensive monitoring of the Arctic, as it is warming faster than the rest of the world," he added.
Buontempo said policymakers who prioritize mitigating climate risks "should see these records as alarm bells" and think more seriously than ever how to best comply with the 2015 Paris Agreement.