It might have been, though the traffic sound very real. First the dispatcher , asked all hold traffic, they tried several times to get officer traffic. They were obviously wearing respirators as their transmissions were very muffled. The officers were in a basement or on the first floor, separated from their crews, one had fallen though a floor partly. O2 was low. But on the other side, no regular tone out traffic on sccda 1p. There should have been more radio traffic from the on scene commander. So I guess "I was hornswoggled". False alarm.