Thanks keberoxu & Jennie.

Weather extremes across the world. Scary! I just saw a news headline saying that some places in outback and south-east Australia will hit almost 50 deg C, and I know that won't be just on one day. It will be for a few days.

It makes sense for places like Coober Pedy in South Australia to have homes and hotels etc built underground where some of the older, now abandoned opal mines were. That's one way to escape the searing sun. I have visited there but I haven't seen the underground places.