Neil asked, "Why are the camels thirsty,
now?"
There are still drought conditions in parts of Australia. These conditions have existed for many years. Some parts of Australian continent get lots of rain. Others, get little, or nil. Problems come about when the weather patterns vary, due to El Nino and La Nina effects.
See this page at Australian Bureau of Meteorology:-
http://www.bom.gov.au/cgi-bin/silo/rain ... ime=latest
The low rainfall area in the centre of the continent is coded brown. This graphic is for the Northern Wet Season, 1 Oct to 18 Dec 2009.
Compare with this page showing the Southern Wet Season, from 1 Apr to 30 Nov 2009:-
http://www.bom.gov.au/cgi-bin/silo/rain ... ime=latest
The centre of the continent is again, brown, indicating low rainfall.
The camels are in the central desert regions, which received only low rainfalls to replenish natural water-holes, creeks and ponds. There are reports that some water-holes are dry and contain, or are surrounded by, camel bones.
It is not just camels that are affected. Last summer, farmers in some areas were shooting cattle and sheep because there was no ground feed and little / no water.
The region where I live is on the (moister) east coast. But we still have restrictions in place on water use, although not as harsh as last summer.