I'm reading a book called "As a Thief in the Night". Here's one thing I read: And the third angel sounded and there fell a great star from heaven, burning as it were a lamp, and it fell upon the third part of the rivers, and upon the fountains of waters; And the name of the star is Wormwood: and the third part of the waters became wormwood; and many men died of the waters, because they were made bitter. According to the author the english translation of the word "Chernobyl" is wormwood.
When they say that a third part of the rivers were contaminated they could be right. And for sure thousands of people have died and are dying as a result of the contamination. However, we know that the contamination was caused by a nuclear accident and not a great star falling, (unless somebody is using some kind of alliteration.)
On the other hand if a great star were to fall why would it only contaminate a third of the rivers and a third of the water. It seems logical however that it would contaminate the rivers in a defined area and not helter skelter around the world.