Astronomical events such as things falling out of the sky. In my world, big chunks of rock that contain heavy minerals sometimes come shooting down and hit the earth. If they strike a forest, there may be a forest fire, because they come in hot.

I've seen a red sky caused by extensive fires. That happened in my world in one of our wars against Morgoth, a renegade god who tried to destroy the Elvish race. He set the plains on fire north of my territory, using his dragons, and afterwards those northern reaches were referred to as the Plains of Choking Ash. I remember so clearly how the fire front advanced towards the line of hills and mountains that I and my brothers and some of my cousins lived along, and how the fire seemed to reach up to the clouds, and how the clouds reflected that terrible red light, and it looked as though the sky was on fire.

I don't know how much time we're going to have. These dreams seem to pick a particular scenario and portray it, without showing any of the buildup to that scene. All the dreams give us is something to fear and try to prevent. They don't give us any information about how those events are going to occur, nor about how to prevent them.