All over the world, waters are turning red. From Ohio to Canada to Antartica. On April 28th of this year, Brazil beaches are blood red. Why? Well Revelation 16:4 says, The third angel poured out his bowl on the rivers and springs of water, and they became blood. This is a sign that we are in End Time. Please pray people!!!
Nothing to panic about, mate. It's just caused by
algae blooms, which change colour to a deep red
or dark brown when they reproduce in one area in
large numbers. It has happened before... but pretty much like 21st December 2012, the world didn't end. So yeah...
Just a natural phenomena, as explained by Kum. It also occurs when there are high levels of oxidation, due to metals being released from sub surface, for various reasons.