True, but I consider those irritants on the level of a mosquito-bite.
By "bite us on the arse" I was thinking of catastrophic flooding that forces the permanent evacuation of tens of millions of people from places like Shanghai, Dhaka, New York, and London, or permanent shifting of rainfall areas forcing he abandonment of huge tracts of farmland, leading to famines that kill huge numbers.
Real arse-biting stuff.
But relax, that's at least 50 years in the future!