I've Been Really Dehydrated Recently, Which I Know Is Obviously

I've been really dehydrated recently, which I know is obviously bad and I can easily fix, but I've noticed that whenever I am dehydrated I start having very strange dreams. There's always the odd unexplainable dream we have every so often, but these just feel like a string of very short, distorted dreams that get out of control very, very fast. Some might be odd flashbacks, but then others might be overwhelmingly weird, terrifying, or disgusting... I'm wondering why this happens and/or if it's a normal thing to happen.