Since the devil would take you by surprise, God uses dreams to warn.

How else would you be warned of something that hasn't happened yet, or that you can't see?

I had some long dreams of floods recently

The thing about them is that it puts you in the place of those in disaster

You get to feel what they feel

So things are going along normal, and then one day everything changes

Too late to do or say the things the Holy Spirit wanted you to say

Say them now, but don't start a fight, that is not God's way