Can you cite a source? If that is the case, go file a lawsuit - you will win. But from what I read exigent circumstances is pretty broadly defined and used.
Here's but one legal definition of exigent action during emergency conditions:
'Those circumstances that would cause a reasonable person to believe that entry (or other relevant prompt action) was necessary to prevent physical harm to the officers or other persons, the destruction of relevant evidence, the escape of a suspect, or some other consequence improperly frustrating legitimate law enforcement efforts.'
Again, no. The court cases I cited {Warden v. Hayden, 387 U.S. 294, United States v. Santana, 427 U.S. 38, United States v. Lopez, 989 F.2d 24 (1st Cir. 1993), cert. denied, 510 U.S. 872, 114 S. Ct. 201, 126 L. Ed. 2d 158 [1993]); and United States v. Sewell, 942 F.2d 1209 [7th Cir. 1991]} all required specific evidence of exigent circumstances at a specific address. There is no general exception for exigent circumstances in an entire neighborhood, and I hope no one other than you and the Boston PD or FBI HRT will accept the idea that this created an acceptable precedent.