[manatee]

I got that Star Trek reference right away.

There's plenty of water around, just has too much salt in it.

How about desalinating plants to make fresh water to restock the lakes? I've wondered if that would be a viable option.

This won't help Texas (sorry rhr1956), but it is interesting:
Cheap Drinking Water From The Sun, Aided By A Pop Of Pencil Shavings : NPR