Canberra Now: News in 90 seconds for Wednesday July 5, 2017

There's a slight chance of a shower later this afternoon. The forecast has Canberra shifting back to freezing and sub-zero from Thursday until next Tuesday - so relish a reprieve today.

Think of all the time you've saved not having to defrost your icy car windows - Bonus!

Let's see what's making news.

The Turnbull government insists there has been no major cyber security breach of its health IT systems and says "traditional" criminals - rather than sophisticated hackers - are likely to blame for a website apparently selling the Medicare numbers of all Australians.

But IT and privacy experts are sounding the alarm, using the revelations to call for an urgent rethink of the government's new centralised $1 billion My Health Record system - which is about to be rolled out to most Australians.

Adam Gartrell has more.

Amnesty International, the ACT Opposition have condemned the allegations of systemic violence within the ACT's youth detention centre.

Opposition leader Alistair Coe told Katie Burgess the scandal is a hangover of the former youth jail Quamby.

And Steven Trask's story reveals Dylan Voller's lawyer has spoken out against allegations too, saying rehabilitation, not punishment, needs to be the focus of youth detention in Australia.

Canberra's new rescue helicopter is 40 per cent faster than its predecessor, flies better at night and has already flown 120 missions since April.

Base manager Gerard Longley said the helicopter, launched on Tuesday, was a leap forward

Finbar O'Mallon has more.

A dozen teams battled it out in a damper cook-off at the Aboriginal Tent Embassy as part of National Aborigines and Islanders Day Observance Committee week celebrations

Sophie Wenderoth saw the action unfold and learnt a thing or two about this quintesentially Australian bush bread.

The annual Warm Trees installation has officially launched at the National Arboretum and it's keeping our unique trees well-dressed and, of course, safe from the winter cold.

The colourful display took more than 300 hours to create by literally hundreds of volunteers, required 30 installers, and includes thousands of knitted goods.

Bree Winchester got the first look at this year's knits.