Not sure exactly what the nectar flow situation is the in Ozzieland in those extremely hot temperatures. Bee sure to monitor the amount of honey the bees are able to recover after your extraction so they will have adequate honey stores to carry them through the colder season. I like to ensure at minimum each hive has a deep brood box of frames full of capped honey. It not, I feed them sugar syrup until they do or continue feeding into Fall and Winter which I am doing now. If there is a drought or dearth in the nectar flow, keep a close eye on the amount of pollen the bees are bringing in. If they are not able to find adequate pollen, this can be a problem. In cold climates, late late Summer and Fall is when the hives are producing their Winter bees which will live 6 months and are physiologically different to warm season bees which live about 6 weeks. Nutrition is critical for the production of these bees which will see the hive through Winter into Spring.