Wow Kerry, thats
extreme! 
I'm glad you're all safe, and its a bonus that your rare vehicles are OK too. I'm sorry to hear of the damage to your families' property. Its amazing how these things can appear out of nowhere, I suppose our friends in the USA see Tornadoes happen just like that. We are fortunate that these are rare events here.
Wednesday night's prediction was a bit short of the mark, Canberra had -0.3 overnight, an all-time December record. We had just the hint of frost with only a light bite on the Pumpkins. 1 degree colder & much of the spring garden would have been toast.
I know there are mixed opinions about Cliamate Change, I only note that there seems to be more records being set in recent years than when I was younger. The Sciencey types should know more about it than me, so I'll leave it to them.
As Belletts (and Florians) are light on fuel, I'll keep driving mine as my contribution to moderating any possible effects. Just one more good reason......
Cheers, Matt.