I live on the Upper East Side ( neighborhood bellow East Harlem), and heard the fire trucks heading up Park this morning.
The buildings in that area are mainly old walkups that are only 4 or 5 floors. Hopefully, not many people were home.
I may get hate for saying this, but...
The reason I suspect the president was informed has to do with the neighborhood that this occurred in. East Harlem, for the most part, is poor, unsafe, etc. Mayor De Blasio is very liberal & adamant in pushing a certain agenda.