I well aware that is actually warm in Australia this time of year.
The problem is they are trying to panic people in northern North America about excess heat when the heat pumps have shut down from excess cold.
Panic people about the heat in the summer. Where I live summer time peaks out at about 105 F (40.5 C). Then "It's going to be even worse" might carry some weight.
Other numbers for consideration, summertime inside temp 80 F, outside 105, delta 25 F
wintertime inside temp 65 F, outside -5 F , delta 70 F. (it very rarely gets colder than -5 F here, one reason I don't live near Mother.) Guess when my electric bill is higher? (There is no natural gas service here.)
Days in 2025 the heat pump was in cooling mode for part of the day, (typically 6 to 7 hours), 22
Months where the heat pump is in heating mode all day, November to March inclusive, Partial heating mode months, October, April, first half of May.