Write for the neighbor below, because that is the person having the worst day
The resident who did not cause the leak is the least informed person in the building and the loudest one afterward.
A leak in a house is witnessed by one family. A leak in a Brickell or Edgewater tower is witnessed by whoever is under it, whoever got a notice slipped under the door, and whoever heard about it in the elevator the next morning.
Nobody publishes for them. Plumbing content is written for the person with the burst pipe, and the person with the ruined ceiling gets nothing except an argument about who pays.
Post what helps in the first hour. Where a unit's shutoff usually sits and why it may not stop water arriving from above, what to photograph before anyone moves furniture, who in the building should be told and in what order, and what a plumber can do in a unit that is not the source.
Stop short of the money question. Who pays for what between an owner, a neighbor and an association sits in the building's documents and with the insurers, and a contractor guessing at that in public is guessing at somebody's claim.
Say what a plumber is even permitted to touch in a unit that is not the source. Reaching the chase above a soaked ceiling usually needs the condominium association's approval and sometimes its own contractor, and a resident who understands that stops reading the wait as indifference.