"Twice they have predicted 40c plus temps for my town in the last week and it hasn't yet reached 36!!"
Nothing new there. If you can create a heatwave in the mind you don't really need a heatwave. Mission accomplished!
If it makes you feel any better, there are thousands of silent observers that know the BOM is full of it.
As an aside, the Wagga Wagga weather station at the Forest Hill air strip can oscillate up to 3'C in as short a phase as 15 minutes and then do it again and again.
If 37'C is the hourly constant they can get an extra 3'C by measuring the breeze off the tarmac that lifts it to 40'C.
Again mission accomplished! Another heatwave (not).