EUPHRATES AND GLOBAL WARMING: At how much MAXIMUM Global temperature will Euphrates will eventually become dry?

EUPHRATES AND GLOBAL WARMING: At how much MAXIMUM Global temperature will Euphrates will eventually become dry?

As you can see the Global Warming, Global Temperature is increasing every year, Euphrates is also becoming dry year by year. What my actual question is Euphrates may be becoming dry by many reasons, i dont wana know all those reasons, i just want to know that because of Global Warming, MAXIMUM at what temperature/year will it eventually become dry

Present Global Temperature : http://en.wikipedia.org/wiki/File:Instru...

Risks and Impacts of Global Warming :

http://en.wikipedia.org/wiki/File:Risks_...

I mean i hope you understand my question, i just want to know the maximum temperature/year the Euphrates will eventually become dry because of GLOBAL WARMING and eventually no one will able to stop it from becoming dry at that time

Say the Global Temperature responsible for partial dryness and say the Global Temperature responsible for fully dryness

Thanks !!