Experts agree it is impossible to say any one storm is caused by rising temperatures. Numbers of tropical cyclones like hurricanes worldwide are stable at about 90 a year although recent US research shows they maybe becoming more intense.
This is a comment by an expert: " As climate change is happening we know that the frequency of these disasters will increase. If we let climate change continue like it is continuing, we will have to deal with disasters like Katrina and Rita.
This is also a comment from another expert:" It is quite clear that the world's climate is changing and we should take note of it. The hurricance catastrophe in US should be a wake-up call for all of us. UN studies say a build-up of greenhouse gases is likely to cause more storms, floods, desertification and could raise the sea levels by upto a meter by 2100.