It would have been a lot creepier if, when the firemen arrived, the residents were all layed out on the lawn, dead from various fire-related injuries.
But the building was completely untouched by fire.
Wait, wouldn't the call be from a future where it the fire does happen? So the call came from the future and is now a parallel universe, in which the residents did die?
But the building was completely untouched by fire.