Because Deep Carbon Observatory, the scrappily-produced but well-reviewed adventure module from Scrap Princess and Patrick Stuart, which starts with a terrifying flood, is part of this charity bundle, dedicated to helping victims of a terrifying flood.
There are also lots and lots and lots of other things in there, I think Hydra Co-Op has like almost all their stuff in it.
Or, ripped from Zaks reddit; "Dark of Hot Springs Island--gorgeously laid out open hexcrawl with competing factions, brilliant information design and gobs of creativity.
Slumbering Ursine Dunes, Mystery Isles of the Eld and a bunch more trippy stuff from Hydra--I've played in some of these and they're a blast
I Am Zombie Field Manual--this book is gorgeous, the art is embarassingly good. The bundle is worth it for this alone, by Vampire creator Mark Rein-Hagen.
One of the best, weirdest OSR zines (Vacant Ritual Assembly)...
....and wayyyyy more stuff."
*Also if you like, you know, charity and helping people or whatever. But that sounds less fun.