Yes, but this is fiction. It might be possible - assuming Lois and Clark had warning - for them to know there was a bomb-shelter or an underground exit and that's where they were when the building came down. (Hey, it worked to bring Clark back from being missing a way long time in Death and Life of Superman. Survivors were found in a bomb shelter weeks after Metropolis was wrecked so Superman faked finding Clark in a similar shelter.)
