Being on the top floor of a building means we hear all the sounds funneling up to us. Last week we had sirens blasting continuously. Eventually we worked out the commotion was coming from a building across the way from us. We couldn't see that they had evacuated the building but one of the engines had an extendable ladder, although it only managed about 8 floors. I counted 12 emergency vehicles in total. The only thing I found out later was that there had been a fire in a trash can??
The ironic thing was that last Monday, we too had to evacuate the building due to some contractors working on the roof who accidentally set off the fire alarm. Walking down 14 flights of stairs was not fun in sandals though.