On Monday there was a massive spill of toxic coal ash, the leftovers from using coal to produce electricity. It gets dumped into a nearby pond, but the dikes keeping the dumping site from spilling over failed and now the entire area is flooded with coal ash. With rains will come the flow of the ash into rivers that provide water for Knoxville and other areas of Tennessee.
Here is some YouTube video on this:
And the link for a more in depth look at what has happened:
It looks like some families will not have a very merry Christmas this year.