This was two years ago:
Yangtze River Runs Mysteriously Red
A stretch of China’s longest river has abruptly turned the color of tomato juice, and officials say they don’t know why.
Residents of the southwestern city of Chongqing first noticed that the Yangtze River, called the “golden waterway,” had a spreading stain on its reputation yesterday (Sept. 6).
Though the bright-red water was concentrated around Chongqing, Southwest China’s largest industrial center, it was also reported at several other points along the river, according to ABC News.
http://www.livescience.com/23038-yangtze-river-red.html
I’m sure it’s caused by global warming.
Reporters: “Chinese Officials, why would the rivers suddenly run red one day?”
Chinese Officials: “I’m sure we don’t know. Perhaps we could investigate. We’ll get back to you.”
It’s official! It’s a mystery! What could it be? Mankind may never know!!! (cue Theremin)