Buffy the Vampire Slayer: Halloween Rain

Around Sunnydale, they say a scarecrow saturated with Halloween rain will come alive and slaughter anyone in sight. (Lovely place, Sunnydale.) Buffy's best friends, Xander and Willow, used to think the tale was nonsense - but after a few adventures with Buffy, they're not so sure.

Even without a maniacal scarecrow, a Sunnydale Halloween is a truly horrific happening. There are enough zombies and vampires about, ready to party hearty and eat some brains, to keep the Slayer and her friends up all night.

And then the rain starts to fall...
https://openlibrary.org/works/OL79043...