Climate change effects are not restricted to the third world (though very often the impact is felt more harshly here).
In the USA the volume of water in the Colorado river has fallen by the volume of lake Mead in 23 years – this is the equivalent of 15 billion Olympic sized swimming pools. More than 40 million people rely on this river for their water – along with millions of acres of farm land.
Despite the drought that has hit the area, scientists have calculated that the water loss would not have had anywhere near the effect without the human caused climate change.
This may simply be early signs of things to come in the USA