I watched that one on TV when I was in 8th grade. It was a row house, not an apartment, but yes.
The MOVE cult had built a sniper shelter on the top of their row house. The Philadelphia Police were in a standoff with them(a siege of the row house), and dropped an improvised bomb from a helicopter onto the sniper shelter. It blew up the shelter, but also started a fire. There was no way to put out the fire, because the MOVE cult was firing upon the firefighters. The fire burned down not just the row house, but I believe two blocks of row houses. The fire blew over the street, and into another block.
There really is no easy way to take on a cult who is under siege.
But yes, Philadelphia is the "City That Bombed Itself." Other cities get bombed by foreign powers, international terrorists, or domestic terrorists. Philadelphia gets bombed by its own police... Or at least did get bombed.