While North America has been freezing, and southern Australia has been burning, spare a thought for Townsville in North Queensland. They have had more than their annual average rainfall in less than a week with much of the city inundated. What has this to do with engineering? The Ross River Dam which is above the city has peaked at 245% capacity and it has not failed. This is why engineers build structures to survive 1 in 100 year disasters. Cheers