BBC: Australia has been battling unseasonably bad bushfires for weeks. The flames have destroyed hundreds of homes - and have also intensified a political debate about whether there is a link with global warming.
Australia's Blue Mountains get their name from the eucalyptus trees that coat their slopes.
On a warm day the sun heats up the oils in the trees' vibrant green leaves. As those oils evaporate into the atmosphere it gives the range a shimmering blue hue.
For much of this week though the...