Here is a simple equation:
Wind + Dirt + Rain = Muddy Rain
It is gross, it is nasty, it covers everything, but it isn’t going to kill you and it is not even toxic.
This was something that happened yesterday in San Antonio and surrounding regions. People were freaking out! They thought it was something toxic and they were scared. One lady even called the news station to ask if it was acid rain. Most had never seen anything like it. Here is a link to a video. (I couldn't get it embedded here and sorry about the commercial.)
I grew up in west Texas and this happened every so often. I guess none of these people had ever been to west Texas! :)
Have you ever seen this? Would it freak you out if you haven't?