According to Nancy, of the blog Science Girl, not only is water from the Gulf of Mexico a part of the rain today (as the remnants of tropical storm Lee pass over Washington), but also some sea salt, and even DNA!
"well, there is a -little- salt in the storm clouds, but only what comes from the sea surface being all whipped up and tiny droplets getting dispersed directly into the air and caught up in the wind. So there's more salt in hurricane clouds than in other clouds over the sea. Just as a non-sequitur - my lab recently sequenced the DNA of a local cloud. Indeed there was DNA in the cloud! More than I would have thought, all from spores and microorganisms caught up in the wind."
A little creepy, thinking about spore DNA in rain. When I go for my walk today, I will take the big umbrella.
What I wish more than anything is that I could send this rain directly to Texas. I have a lot of friends there, one in particular whose house has probably burned, another who is preparing to evacuate. It's out of my hands, but I'm praying anyway.