Dozens of fires will burn across Australia for weeks, fire authorities say, including a “mega-fire”, already the size of greater Sydney, that is too big to put out. Sunday there were 96 bush and grass fires in NSW – 47 of which were not contained. Five fires are at a watch and act level. …Already this fire season, six people have died and more than 1,000 homes have been lost across. The largest conflagration, the “mega fire” at Gospers Mountain near Sydney’s north-western outskirts, was likely to burn for weeks until substantial rain falls… The NSW Bureau of Meteorology said the largest fires simply could not be extinguished by water-bombing aircraft or firefighting crews on the ground. …The chief scientist at the Australian Royal Society for the Prevention of Cruelty to Animals, Dr Bidda Jones, said that, beyond the human cost of the fires, the widespread blazes would have a “major impact of biodiversity”.