Okay. It's s'posed to rain, so find a big tree to hide under, or build yourself, like, a shelter with some branches. Keep at least your Vulpix and your highest-level Pokémon out while you're sleeping. Set your 'Gear to wake you up every hour or two so you can check up on them or whatever.

[ She pauses, considering. ] Build a little fire now while it's not raining, and try to collect some wood and put it someplace where it's not gonna get totally soaked. Like, under your coat, if you have one.

Once the sun starts coming up, you can find your way back. Probably.