As someone who worked the graveyard shifts for years, and who has spent time at the ocean from dusk to sunrise, I can promise you that there are red sunrises.
The trick, I think, is not in the color of the sun, but in the gradations above, higher in the sky. You can really observe this when you're flying. But I haven't gotten that science straight, in my mind, so I can't describe it yet. It has something to do with a phenomenon called "the terminator". There's a lot to it, and within the whole saga is also something called "false dawn". The sky is a fascinating subject.
Meanwhile I assure you that I've been very careful to only post that which has been labeled "sunrise". If anything has been incorrectly posted, then the photographers lied. I find that hard to believe, but perhaps it's so. I suppose, though, for the benefit of all, I should go through here and delete the "red sunrises". Just know that things aren't that simple.
I've picked what I've picked for the promise and excitement they have held for me. Many of the pictures in this thread are therapeutic and healing (for me), and I hoped to share that.