University of Chicago Climate Impact Lab researchers say extreme heat from a "super El Niño" could drive a sharp rise in extremely hot days, with Nigeria, Indonesia and Sudan among the hardest-hit countries.
An online disagreement about this summer's heatwaves has highlighted a broader debate among scientists over whether the planet may be warming faster than previously estimated, according to a BBC Science & Environment report.
With the 2015 Paris Agreement's temperature target increasingly seen as unattainable, some experts are questioning whether the global community needs a new framework for climate action.
A new United Nations-linked report concludes that surpassing the Paris Agreement's temperature threshold is now unavoidable, with the limit expected to be breached within a few years.