Dreams speak in symbols, rather than absolutes. Occasionally they provide prophecy, but them you’d probably see the same event not different ones.
Most dreams contain elements from life and memories are stored away. This can cause lots of confusion but when you pick them out thy can be ignored.
Then you have your problem solving dreams, which take something that worries you and try to find solutions.
These are often all mixed up together as well.
So the first question becomes, what are the symbolic elements that matter, and what do they mean to you?
If this were me, I’d sit down to analyse it, and I might come up with something like:
- Unexpected event, no warning
- that no one could have prepared for
- The event is fast
- The event has a lot of energy behind it
- Many people are affected
- You care about these people
- You can’t help them
- You are not always part of the event (?)
- Is it important that man made structures like buildings or roads are usually involved?
Your own analysis is probably going to be different, and that’s why dream interpretation is personal and it’s hard for people to do it for you and get it right. It’s worth spending time meditating, and in that calm state, ask the question, the answer should come to you.
And from here it’s worth asking if this is a warning to you or your subconscious that something disastrous is coming that you should be careful to look for, or, is it a fear based problem solving style dream from something you were exposed to in daily life? Either way it’s helpful to keep an attitude of calm, detached curiosity throughout the process.
Hope that helps. 
We also have a small collection of Dreamwork discussions here that you might be interested in