In August, the Intergovernmental Panel on Climate Change (IPCC) released Climate Change 2021: The Physical Science Basis, the Working Group I contribution to the Sixth Assessment Report.
In this report, the assessment has been updated, stating it is likely that the global proportion of major (Category 3-5) tropical cyclone occurrences has increased over the last four decades and that this cannot be explained by internal variability alone; in other words, it likely is caused by human activities.