if it's okay to post here. The topic seems in line with your OP. It wasn't very long, but left a disturbing impression in my thoughts this morning.
For whatever reasons, I was riding in another friend's car (I don't know this person in waking life) and we were on one of the freeways around Houston, with the skyline in view. It was one of the freeways closer to downtown, so the buildings were clear and not obscured by pollution, like when viewed from one of the outer loops.
Before we were very far from the downtown area, an earthquake hit and we all watched in horror as almost all of the buildings began to collapse and topple over. This was also in the early afternoon, like around 1:30 pm, so the city was filled. I do remember noting, either to myself, or the other two or three in the car that the buildings that survived were the older ones built in the mid-20th century, and not the newer ones.
Of course, we were on one of the elevated freeways and it began to collapse, too. We were right at the end as the road gave way beneath the car and our momentum carried us up and over the edge to 'safety'. It was like a roller-coaster ride, in a way.
One thing to note: Houston and the rest of the upper Gulf Coast is a zero earthquake zone. The only way we can have earthquakes is if something massive happened elsewhere in the world. I didn't get that impression in this dream, but I was 'awake' during the aftermath, such as trying to get TV reception and finding one station still able to broadcast. The story I happened upon was of people using vehicle IDs to identify the dead.
So, depressing dream to remember for the day. Plus, I overslept by about half an hour