SIGN OF BLOOD TO DRINK

Then the second angel poured out his bowl on the sea, and it became like the blood of a corpse. And everything in the sea died.
Then the third angel poured out his bowl on the rivers and springs, and they became blood. And I heard the angel who had authority over all water saying,

“You are just, O Holy One, who is and who always was,
because you have sent these judgments.
Since they shed the blood
of your holy people and your prophets,
you have given them blood to drink.
It is their just reward.”

http://www.livescience.com/15346-texas-lake-blood-red.html

People are so blind that they can't read a sign when it's right in front of their face.