Singapore is already completely inundated in severe WBGT conditions: https://www.wbgt.sg/allstations

thankfully, much of the population are within easy reach of conditioned air, either their home, office or an indoor mall. many parts of the shopping district are connected underground, so that people don't have to over-expose themselves to the climate to get from place to place.

we've not been able to terraform our habitat, but we've been able to create sufficient pockets of habitable spaces for us to continue functioning as a society.

it's always a bit of a fascination for me. soon strenous outdoor activities in singapore will be completely impossible, and maybe, in the near future, even idling outside will be a risky endeavour. this feels almost dune-like, except frank herbert never thought lethal humidity would be the other way around.