In 2007 the IPCC’s 4th Assessment Report written by thousands of climate scientists made these key statements:
Climate change impacts will very likely (greater than 90% probability) increase due to increased frequencies and intensities of some extreme weather events.
Unmitigated climate change would, in the long term, be likely to exceed the capacity of natural, managed and human systems to adapt.
Many impacts can be reduced, delayed or avoided by mitigation.
It took scientists still a bit, until IPCC AR4, to prove that #climatewarming is unequivocal and leading to increased frequencies and intensities of extreme events.