As we know the bible says the rivers turned the blood red in relation to Moses and there have been numerous reports of blood colored rivers due to various different causes. We featured the one from Texas on this blog last year. Now on re-looking at it, it was in HOUSTON of all places. 
Maybe if we pay attention to what is happening to the rivers it will stop happening. IMHV, the one featured today on the forums in Beirut is another warning and remainder of what happened in the summer of 2006 to Beirut when Islam attacked Israel.
See these pictures of Jian river in China. 
New York 
Red Rivers in Lebanon, China and the USA.