And let's not forget:Mahina - March 4, 1899
Category 5 Tropical Cyclone Mahina is the deadliest in Australia's recorded history.
More than 400 people died when the storm system hit Princess Charlotte Bay, north of Cooktown on Cape York.
A 9-metre tidal surge left dead porpoises on clifftops, thrown there by the heavy swells.
It destroyed dozens of boats in local pearling fleets, killing about 100 ill-fated sailors and crew members.
Mahina caused a massive tidal surge, flooding the region and accounting for another 307 known fatalities on land.
The system was made worse because it intersected another weather system, dubbed Monsoonal Disturbance Nachon.
And as for the CO2 level in 1899
