Tragedy Changes Everything

I wonder if any kind of coherent story could be made out of my random, discordant dream pieces.

Prompt: A fire in the neighborhood brings hundreds of people to a service shelter operating out of the local school. Many almost died but not all were placed in fatal danger. Injuries and smoke inhalation all vary. Groups are kept together to monitor for discrepancies and to better focus and administer cooling.

But besides typical symptoms and sicknesses starting to emerge are personality changes across the board. Some adults act like teenagers but not their own teenage children who weren't acting like themselves anymore either.

Everyone's personalities swapped around and melded into other people. No one was... themself anymore with no sign of swapping back.

That is, until they do but their decisions are lasting and they're not the same people from before.