[Cranstonvm]

I think I missed something, when and what did this happen? And what does it mean?

[Black]

I think I missed something, when and what did this happen? And what does it mean?

Twilight Horizon for more info...

[Mithlas]

Or check google for the real-life phenomena, some of the geographic or mytho/historical backdrop might give you additional ideas. There's even an article on it in wikipedia, as well as "blood" (or "watermelon snow" according to the wikipedia article). Otherwise, Twilight Horizon is your book.

[Mirikon]

I think I missed something, when and what did this happen? And what does it mean?

In Twilight Horizon, it turns out that Horizon has been doing Bad Things^(tm) to spirits in the Mojave. The spirits get angry, and take a natural phenomenon and advance it to supernatual levels. Such as cities getting flooded with rain the color of blood, and other such things. I expect this will get more play in the future.

[TheWanderingJewels]

I wholly expect actually Blood rain at some point if Horizon keeps things up